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#1 |
Senior Member
![]() Join Date: Dec 1999
Location: New Palestine, IN
Posts: 470
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my brother-in-law has a 67 GMC 3 speed inline six. He wants to put in a 350 and keep the 3 speed trans. Will the flywheel off the 6 cyl bolt up to the 350? Anything else you want to add to the swap. He knows he needs to move the motor mounts forward.
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72 Shortbed fleetside 402 BB, AC, Posi 72 Super Cheyenne Longbed 350 49,000 original miles and My dad ordered it new 66 Chevy Caprice 2 dr 77 Caprice Estate Wagon New Palestine, IN |
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#2 |
Watch out for your cornhole !
![]() Join Date: Jun 2003
Location: Azle, Texas
Posts: 14,162
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As long as it is the pre 87 small block with the two piece rear main seal. The flywheel, clutch, starter all will work.
Leave the engine mounts alone. Just drop the 350 right in where the 6 was. You don't have to move anything. Last 6 to 8 swap I did this exact same thing. Reused all the 6 flywheel and clutch stuff. Same engine mounts too. The mounts unbolt from the 6 cyl brackets and bolt straight to the V8 block. I even reused the 6 cyl radiator with no problems. The whole swap to about 3 1/2 hours. The engine was still warm when I set it on the floor. Make sure you have the clutch pivot ball that screws into the threaded hole above the oil filter on the side of the block. GM dealer if you need it. Re use the clutch linkage and z-bar. Kevin
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I'm on the Instagram- @Gearhead_Kevin |
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#3 |
Registered User
Join Date: Nov 2002
Location: Kannapolis, NC
Posts: 552
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I beleive you can mount the sb in the I6 position and bolt it right up to the flywheel. Hard time to get to the distributor but it saved me some $$ on new mounts. Also, I have a 10.5" clutch instead of the v8 11" or 11.5? It has held up though.
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#4 |
Watch out for your cornhole !
![]() Join Date: Jun 2003
Location: Azle, Texas
Posts: 14,162
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I forgot, you will need to build a longer rod for the accelerator hook up to the carb.
I used Hooker Comp headers and they cleared everything including the clutch z-bar, even though the engine was back in the 6 cylinder position.
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I'm on the Instagram- @Gearhead_Kevin |
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#5 |
Fabricate till you "puke"
Join Date: Jun 2002
Location: Ill
Posts: 9,403
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I 3rd that swap on the 250 stands......no driveline or bell crossmember issue to deal with(the bell crossmember is different from I6 to V8). My longhorn is set up that way, & has #2452 Hooker comps(60690 headmans will also work). The HEI dist does fit a little tight. good luck,crazyL
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69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears.... |
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#6 |
Senior Member
![]() Join Date: Dec 1999
Location: New Palestine, IN
Posts: 470
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Thanks Kevin, 72chevyguy, and longhorn. I will pass this information on to him.
Mark PS: Kevin I sent you a PM about some parts.
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72 Shortbed fleetside 402 BB, AC, Posi 72 Super Cheyenne Longbed 350 49,000 original miles and My dad ordered it new 66 Chevy Caprice 2 dr 77 Caprice Estate Wagon New Palestine, IN Last edited by Downtown; 09-15-2003 at 09:36 AM. |
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#7 |
Registered User
Join Date: Aug 2003
Location: Independence, MO
Posts: 216
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Did I hear you guys correctly...you can drop the SBC right in where the L6 was using same motor mounts? Giddy up! That will save some money when I get to that point. Thanks guys!
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Douglas King Independence, MO |
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#8 | |
Resident Curmudgeon
![]() Join Date: Dec 1999
Location: NH
Posts: 6,664
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Quote:
But for the rest of us with limited skills, equipment and time resources... If you're like me and prefer to have all the parts work and fit out of the box, then I suggest you take the time and effort up front and mount the motor and tranny in the location as intended by the engineers. You'll have to locate a few extra parts up front and lengthen your driveshaft, but this approach virtually guarantees any aftermarket or stock part you'll need/want in the future will fit as designed. A lot people disagree with me on this, but I'm driving while they're cussing, fabricating, and scratching their heads. ![]() Like the old Fram filter commercial "You can pay me now...or you can pay me later..."
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Currently on or near the homestead: 67 Chevy SWB 2WD stepside 350/3 on tree (Pat's) 67 GMC SWB 2WD Fleet 402/auto (Brian's under construction) 67 Chevy 3/4 ton 2WD 402/auto (Business Hauler) 67 Chevy 1 ton dually 2WD 396/4 speed (Former business hauler, Needs TLC) 68 Chevy 1/2 ton Suburban 2WD 250 six/3 on tree (Brian's Needs TLC) 70 Chevy 3/4 ton 4WD 350/4 speed (Pat's - Disguised as a 68 GMC) 71 Chevy SWB stepside (Crushed by tree - parts donor) 72 Chevy 3/4 ton 4WD (Parts donor) 72 Chevy 3/4 ton 4WD Suburban (Parts Donor) 72 GMC 3/4 ton 4WD 292 six/4 speed (Mine - Disguised as a 67 GMC) 81 GMC 4WD Dually Dump Body 350/4 speed (Business Hauler) 82 Camaro Z/28 355/Super T-10 (Pat's toy) 93 Caprice 9C1 (Brian's Cop Car) 02 Toyota Camry (Reliable but a souless steel and plastic hulk) 2011 2SS RS Camaro M6 Factory Hurst Shifter ![]() Maybe I need to sell some of this crap ![]() Yet another Bozo with a sawz-all Last edited by CPNE; 09-15-2003 at 10:27 AM. |
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#9 |
Project Junkie! Fishing Poor!!
![]() Join Date: Dec 1999
Location: Olympia,Wa. 98512
Posts: 10,770
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I agree with Jeff on this one, and I would also like to add that the V-8 in the 6 cylinder possition is a dead give a way to this modification. This is another reason why I wont do things that way. I like for someone to open the hood of my truck and not tell that it ever has been modified. I purchased a 68 that had been converted that way, and had nothing but trouble with the re-ingineered clutch linkage.. I could never figure out why someone who is spending big bucks restoring, and modifying their truck wouldn't take the extra time and effort to move the engine forward. The largest expence would be the driveline, but in the big picture this isn't a huge expence. If someone was in a pinch I could understand, but I guess to each his own. That is what makes these truck so fun. They are easy to work on and modify. WES www.ClassicHeartbeat.com
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On-line catolog Classic Heartbeat Pickup Parts WEHEPP@comcast.net Call us Toll Free (888) 338-2502 Like Us on Facebook No appointment necessary. 72 BB Chevy Custom Deluxe / Custom Camper 67 I-6 (Soon to be 5.7 LS1) Panel 68 BB Chevy Short Bed 72 6.0 LQ9 Short Bed Chevy 4X4 Olympia's fastest growing truck parts supplier. Olympia's home for Wayward Chevys |
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#10 | |
Resident Curmudgeon
![]() Join Date: Dec 1999
Location: NH
Posts: 6,664
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Quote:
![]() All I have to say to the I6 position guys is :p
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Currently on or near the homestead: 67 Chevy SWB 2WD stepside 350/3 on tree (Pat's) 67 GMC SWB 2WD Fleet 402/auto (Brian's under construction) 67 Chevy 3/4 ton 2WD 402/auto (Business Hauler) 67 Chevy 1 ton dually 2WD 396/4 speed (Former business hauler, Needs TLC) 68 Chevy 1/2 ton Suburban 2WD 250 six/3 on tree (Brian's Needs TLC) 70 Chevy 3/4 ton 4WD 350/4 speed (Pat's - Disguised as a 68 GMC) 71 Chevy SWB stepside (Crushed by tree - parts donor) 72 Chevy 3/4 ton 4WD (Parts donor) 72 Chevy 3/4 ton 4WD Suburban (Parts Donor) 72 GMC 3/4 ton 4WD 292 six/4 speed (Mine - Disguised as a 67 GMC) 81 GMC 4WD Dually Dump Body 350/4 speed (Business Hauler) 82 Camaro Z/28 355/Super T-10 (Pat's toy) 93 Caprice 9C1 (Brian's Cop Car) 02 Toyota Camry (Reliable but a souless steel and plastic hulk) 2011 2SS RS Camaro M6 Factory Hurst Shifter ![]() Maybe I need to sell some of this crap ![]() Yet another Bozo with a sawz-all |
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#11 | |
CCRider
Join Date: Feb 2000
Location: Olive Branch,MS,USA
Posts: 2,232
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Quote:
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72 GMC Sierra SWB almost finished---- 84 Softail Olive Branch MS |
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#12 | |
Resident Curmudgeon
![]() Join Date: Dec 1999
Location: NH
Posts: 6,664
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Quote:
Again, small issues if you're aware of them and mechanically inclined, but big issues if you inherit or embark on such a swap uninformed. Imaging going to NAPA and asking for an alternator belt for a 72 350 which you assume is stock, not knowing better. You get the wrong belt and a lot of frustration to boot. Again, my point was that giving advise based on personal experience no matter how well intended and how good it is, needs to be tempered with the caveat that you're assuming the recipient of said advise has same level of knowledge and expertise. That being said, for some of us just trying to refurbish an old truck with limited resources, it's better to travel as close to conventional as possible. Nowhere did I say anyone's ideas were wrong or incorrect, I was just trying to impress on these guys that its not necessarilly the "slam dunk" it sounds like and they need to consider their own personal circumstances before saying "cool, I can do that".
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Currently on or near the homestead: 67 Chevy SWB 2WD stepside 350/3 on tree (Pat's) 67 GMC SWB 2WD Fleet 402/auto (Brian's under construction) 67 Chevy 3/4 ton 2WD 402/auto (Business Hauler) 67 Chevy 1 ton dually 2WD 396/4 speed (Former business hauler, Needs TLC) 68 Chevy 1/2 ton Suburban 2WD 250 six/3 on tree (Brian's Needs TLC) 70 Chevy 3/4 ton 4WD 350/4 speed (Pat's - Disguised as a 68 GMC) 71 Chevy SWB stepside (Crushed by tree - parts donor) 72 Chevy 3/4 ton 4WD (Parts donor) 72 Chevy 3/4 ton 4WD Suburban (Parts Donor) 72 GMC 3/4 ton 4WD 292 six/4 speed (Mine - Disguised as a 67 GMC) 81 GMC 4WD Dually Dump Body 350/4 speed (Business Hauler) 82 Camaro Z/28 355/Super T-10 (Pat's toy) 93 Caprice 9C1 (Brian's Cop Car) 02 Toyota Camry (Reliable but a souless steel and plastic hulk) 2011 2SS RS Camaro M6 Factory Hurst Shifter ![]() Maybe I need to sell some of this crap ![]() Yet another Bozo with a sawz-all |
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#13 |
Project Junkie! Fishing Poor!!
![]() Join Date: Dec 1999
Location: Olympia,Wa. 98512
Posts: 10,770
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Well said Jeff... Somewhere down the line the truck will be sold and resold. The issue isn't generaly for the person doing the swap, however it becomes an issue for anyone who buys the truck down the line. WES www.ClassicHeartbeat.com
__________________
On-line catolog Classic Heartbeat Pickup Parts WEHEPP@comcast.net Call us Toll Free (888) 338-2502 Like Us on Facebook No appointment necessary. 72 BB Chevy Custom Deluxe / Custom Camper 67 I-6 (Soon to be 5.7 LS1) Panel 68 BB Chevy Short Bed 72 6.0 LQ9 Short Bed Chevy 4X4 Olympia's fastest growing truck parts supplier. Olympia's home for Wayward Chevys |
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#14 |
Registered User
Join Date: Nov 2002
Location: Kannapolis, NC
Posts: 552
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Thats a good point WES. Didnt think about that... (I was young, and had no $$
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#15 |
Senior Member
Join Date: Dec 1999
Location: Knightstown, in, usa
Posts: 2,525
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It takes all types to make this world go around. Me, I like to fab and scratch my head (lice?). I can understand, though, those who strive to keep a vehicle "correct". To keep my head scratching at a minimum, I use a small "parts book". This book tells me that the water pump (example) is a 1975, for belt, pump itself, ect. I often have trouble with pep boys types, who SEE my 72 truck, and HEAR me say "1975". hehe, I love it.
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1970 long fleet, 355 4 speed, primer, walnut goodies |
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#16 |
CCRider
Join Date: Feb 2000
Location: Olive Branch,MS,USA
Posts: 2,232
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Well what I was trying to say is unless the person has a v-8 truck sitting there to rob all the parts off of, it would be much easier for a person that was less "mechanically inclined" to put the V-8 in the I-6 position, than to round up all the parts and modifications it takes to do it correctly. Again unless you have a parts truck, you have to round up brackets, pulleys, belts, PS gearbox, anyway...why not try to look for some that are easy to find. And I don't know what NAPA you're going to, but around here you better have the mesurement, number, or old belt with you or you will get the wrong one anyway...lol
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72 GMC Sierra SWB almost finished---- 84 Softail Olive Branch MS |
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#17 |
Fabricate till you "puke"
Join Date: Jun 2002
Location: Ill
Posts: 9,403
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Clutch linkage & headers is not an issue in I 6 position......I have run both Headman(69090), & Hooker(2452). The mods to the linkage are very simple, & the clutch works fine
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69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears.... |
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#18 | ||
Resident Curmudgeon
![]() Join Date: Dec 1999
Location: NH
Posts: 6,664
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Quote:
"Owner's manual? No, don't have it. I did have one but I replaced it with the Hollanders Interchange manual you'll find under the seat. Comes in handy when you want to change the plugs." ![]() Quote:
As usual there's good arguments either way, and no wrong way to do it (but my way is more correct ![]()
__________________
Currently on or near the homestead: 67 Chevy SWB 2WD stepside 350/3 on tree (Pat's) 67 GMC SWB 2WD Fleet 402/auto (Brian's under construction) 67 Chevy 3/4 ton 2WD 402/auto (Business Hauler) 67 Chevy 1 ton dually 2WD 396/4 speed (Former business hauler, Needs TLC) 68 Chevy 1/2 ton Suburban 2WD 250 six/3 on tree (Brian's Needs TLC) 70 Chevy 3/4 ton 4WD 350/4 speed (Pat's - Disguised as a 68 GMC) 71 Chevy SWB stepside (Crushed by tree - parts donor) 72 Chevy 3/4 ton 4WD (Parts donor) 72 Chevy 3/4 ton 4WD Suburban (Parts Donor) 72 GMC 3/4 ton 4WD 292 six/4 speed (Mine - Disguised as a 67 GMC) 81 GMC 4WD Dually Dump Body 350/4 speed (Business Hauler) 82 Camaro Z/28 355/Super T-10 (Pat's toy) 93 Caprice 9C1 (Brian's Cop Car) 02 Toyota Camry (Reliable but a souless steel and plastic hulk) 2011 2SS RS Camaro M6 Factory Hurst Shifter ![]() Maybe I need to sell some of this crap ![]() Yet another Bozo with a sawz-all |
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#19 | |
Resident Curmudgeon
![]() Join Date: Dec 1999
Location: NH
Posts: 6,664
|
Quote:
__________________
Currently on or near the homestead: 67 Chevy SWB 2WD stepside 350/3 on tree (Pat's) 67 GMC SWB 2WD Fleet 402/auto (Brian's under construction) 67 Chevy 3/4 ton 2WD 402/auto (Business Hauler) 67 Chevy 1 ton dually 2WD 396/4 speed (Former business hauler, Needs TLC) 68 Chevy 1/2 ton Suburban 2WD 250 six/3 on tree (Brian's Needs TLC) 70 Chevy 3/4 ton 4WD 350/4 speed (Pat's - Disguised as a 68 GMC) 71 Chevy SWB stepside (Crushed by tree - parts donor) 72 Chevy 3/4 ton 4WD (Parts donor) 72 Chevy 3/4 ton 4WD Suburban (Parts Donor) 72 GMC 3/4 ton 4WD 292 six/4 speed (Mine - Disguised as a 67 GMC) 81 GMC 4WD Dually Dump Body 350/4 speed (Business Hauler) 82 Camaro Z/28 355/Super T-10 (Pat's toy) 93 Caprice 9C1 (Brian's Cop Car) 02 Toyota Camry (Reliable but a souless steel and plastic hulk) 2011 2SS RS Camaro M6 Factory Hurst Shifter ![]() Maybe I need to sell some of this crap ![]() Yet another Bozo with a sawz-all |
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#20 |
Watch out for your cornhole !
![]() Join Date: Jun 2003
Location: Azle, Texas
Posts: 14,162
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I did the V8 into stock 6 cyl place using Hooker Comp headers. The V8 used a screw in pivot ball which screws into the block right above the oil filter. The clutch linkage lined up perfect with zero mods at all. Simple R&R. Repeat no mods at all to the clutch linkage, other than readjusting the clutch afterwards
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I'm on the Instagram- @Gearhead_Kevin |
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#21 | ||
Resident Curmudgeon
![]() Join Date: Dec 1999
Location: NH
Posts: 6,664
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Quote:
Again, everybody is missing my point so it warrants repeating (my turn to roll eyes ![]() Quote:
__________________
Currently on or near the homestead: 67 Chevy SWB 2WD stepside 350/3 on tree (Pat's) 67 GMC SWB 2WD Fleet 402/auto (Brian's under construction) 67 Chevy 3/4 ton 2WD 402/auto (Business Hauler) 67 Chevy 1 ton dually 2WD 396/4 speed (Former business hauler, Needs TLC) 68 Chevy 1/2 ton Suburban 2WD 250 six/3 on tree (Brian's Needs TLC) 70 Chevy 3/4 ton 4WD 350/4 speed (Pat's - Disguised as a 68 GMC) 71 Chevy SWB stepside (Crushed by tree - parts donor) 72 Chevy 3/4 ton 4WD (Parts donor) 72 Chevy 3/4 ton 4WD Suburban (Parts Donor) 72 GMC 3/4 ton 4WD 292 six/4 speed (Mine - Disguised as a 67 GMC) 81 GMC 4WD Dually Dump Body 350/4 speed (Business Hauler) 82 Camaro Z/28 355/Super T-10 (Pat's toy) 93 Caprice 9C1 (Brian's Cop Car) 02 Toyota Camry (Reliable but a souless steel and plastic hulk) 2011 2SS RS Camaro M6 Factory Hurst Shifter ![]() Maybe I need to sell some of this crap ![]() Yet another Bozo with a sawz-all |
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#22 | |
CCRider
Join Date: Feb 2000
Location: Olive Branch,MS,USA
Posts: 2,232
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Quote:
Cause when the salt gets through with 'em, that all that's left ![]()
__________________
72 GMC Sierra SWB almost finished---- 84 Softail Olive Branch MS |
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#23 | |
Resident Curmudgeon
![]() Join Date: Dec 1999
Location: NH
Posts: 6,664
|
Quote:
__________________
Currently on or near the homestead: 67 Chevy SWB 2WD stepside 350/3 on tree (Pat's) 67 GMC SWB 2WD Fleet 402/auto (Brian's under construction) 67 Chevy 3/4 ton 2WD 402/auto (Business Hauler) 67 Chevy 1 ton dually 2WD 396/4 speed (Former business hauler, Needs TLC) 68 Chevy 1/2 ton Suburban 2WD 250 six/3 on tree (Brian's Needs TLC) 70 Chevy 3/4 ton 4WD 350/4 speed (Pat's - Disguised as a 68 GMC) 71 Chevy SWB stepside (Crushed by tree - parts donor) 72 Chevy 3/4 ton 4WD (Parts donor) 72 Chevy 3/4 ton 4WD Suburban (Parts Donor) 72 GMC 3/4 ton 4WD 292 six/4 speed (Mine - Disguised as a 67 GMC) 81 GMC 4WD Dually Dump Body 350/4 speed (Business Hauler) 82 Camaro Z/28 355/Super T-10 (Pat's toy) 93 Caprice 9C1 (Brian's Cop Car) 02 Toyota Camry (Reliable but a souless steel and plastic hulk) 2011 2SS RS Camaro M6 Factory Hurst Shifter ![]() Maybe I need to sell some of this crap ![]() Yet another Bozo with a sawz-all |
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