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#1 |
Registered User
![]() Join Date: Jun 2012
Location: Auburn Ca
Posts: 5
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Small block on 6 cylinder mounts?
I have a 68 c10 that I have a 350/700R combo, Is there enough fire wall clearance to run 6 cylinder mounts? I have both forward V8 mounts and the rear 6 cylinder mounts. Would prefer to run the 6 mounts to clear the headers I bought. Is there enough room to run a HEI Distributer with the 6 mounts. We used the same mounts on my sons 66 c10 (6 cylinder) and worked great with a small block, but we had to modify the firewall when he put in a big block. I would appreciate any input you guys have. Thanks john
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#2 | |
The Older Generation
![]() ![]() ![]() Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,486
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Re: Small block on 6 cylinder mounts?
Quote:
It will be really close. You could always use the divorced coil HEI for more clearance. LockDoc
__________________
Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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#3 |
Registered User
Join Date: Jan 2013
Location: Mickleton, NJ
Posts: 1,776
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Re: Small block on 6 cylinder mounts?
Works fine in my truck. Just about 3/4" clearance between the HEI and the firewall.
__________________
Shawn 1970 Chevy C-10 SWB, 350, TKO 600 5 speed My build http://67-72chevytrucks.com/vboard/s...d.php?t=559881 |
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#4 |
Registered User
![]() Join Date: Jun 2012
Location: Auburn Ca
Posts: 5
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Re: Small block on 6 cylinder mounts?
Thanks guys, appreciate the input
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#5 |
Registered User
Join Date: Aug 2012
Location: Midland, TX
Posts: 1,267
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Re: Small block on 6 cylinder mounts?
If you don't mind your firewall looking like this, it can be done. My truck originally had a 6cylinder and the PO decided to put a small block in with out changing to the correct engine stands. I have a few more pics on my build thread if your interested. But I for one would not do it.
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1969 RS/SS Z10 Camaro Pace coupe 1972 GMC Short Step buildhttp://67-72chevytrucks.com/vboard/s...=1#post6356218 1979 Mazda RX7 1979 Pontiac Trans Am WS6 & 1979 Pontiac Trans Am 10th Anniversary 1999 Honda Valkyrie 2006 Corvette Z06 2010 BMW 650i |
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#6 | |
Registered User
Join Date: Jan 2013
Location: Mickleton, NJ
Posts: 1,776
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Re: Small block on 6 cylinder mounts?
Quote:
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Shawn 1970 Chevy C-10 SWB, 350, TKO 600 5 speed My build http://67-72chevytrucks.com/vboard/s...d.php?t=559881 |
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#7 |
Registered User
Join Date: Oct 2010
Location: Ocean Springs, MS
Posts: 1,746
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Re: Small block on 6 cylinder mounts?
If you move the 6 cyl mounts to the forward holes in the frame, you will have plenty of room.
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Gary 1971 Chevrolet C/10 1951 GMC 100 1977 GMC C15 1955 Chevrolet 3100 |
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#8 | |
The Older Generation
![]() ![]() ![]() Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,486
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Re: Small block on 6 cylinder mounts?
Quote:
He mentioned in his first post that he needed to use the rear 6 cyl mounting location for header clearance issues. That's the way I understood it anyway... LockDoc
__________________
Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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#9 | |
Rottenwood Garage Member
Join Date: May 2005
Location: Marietta, Georgia
Posts: 4,321
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Re: Small block on 6 cylinder mounts?
Quote:
Yep...move them forward. I think you will need V8 stands. Why crowd the firewall and leave an ugly gap between the fan and radiator. Do it right the first time. I have passed on buying trucks that had the V8 conversion in the I6 holes.
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2004 Chevrolet Suburban C1500 2001 Chevrolet 2500HD Crew 6.0 1999 Harley Davidson Electra Glide 1972 Chevrolet C-20 Custom Camper "Dump Truck" 1972 Chevrolet C-20 Suburban "Big Green" 1969 Chevrolet C-50 Wedge Hauler "Leonidis" 1966 C-10 2x4 short fleet 327 4 speed "Race Truck" 1952 Plymouth Cranbrook "Rican" (my grandfathers) 1931 Ford Model A Coupe "Black Beauty" 1930 Ford Model A truck "Club Cab" 4x4 Rottenwood Garage and Speed Shop.....where everything must be racy! It's not just a hobby..It's a LIFESTYLE!!! Thanks for nothing Barrett-Jackson You cant fix stupid or teach accountability! Time wasters, looky Lous and tire kickers are everywhere! Last edited by 72freak; 01-30-2014 at 10:42 AM. |
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#10 |
Registered User
Join Date: Jan 2013
Location: Rye Colorado
Posts: 43
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Re: Small block on 6 cylinder mounts?
The last two stepsides I bought had small blocks in the 6 cyl stands,Luckily I had parts trucks with the v8 stands as the 6cyl and v8 stands are different they wont move to the front holes ,at least the ones I had would not work and it gave me alot more room behind the motor
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39 GMC pickup,70 GMC K1500 short bed 4x4 ,72 K10 short bed step side 4x4 ,71 short bed fleet side , 72 K20 long bed ,74 K10 long bed , 69 C30 dump bed dually, 79 K30 standard cab dually , 02 Dodge 4x4 dually |
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#11 |
Registered User
Join Date: Oct 2010
Location: Ocean Springs, MS
Posts: 1,746
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Re: Small block on 6 cylinder mounts?
Well, I guess I could have read a little more closely. I'm not sure if he's talking the position of the mounts or whether they are for 6 or 8 cyl.
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Gary 1971 Chevrolet C/10 1951 GMC 100 1977 GMC C15 1955 Chevrolet 3100 |
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#12 | |
The Older Generation
![]() ![]() ![]() Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,486
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Re: Small block on 6 cylinder mounts?
Quote:
I wondered about that too. LockDoc
__________________
Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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#13 |
Watch out for your cornhole !
![]() Join Date: Jun 2003
Location: Azle, Texas
Posts: 14,162
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Re: Small block on 6 cylinder mounts?
I've done it more than a few times. Never any issue or need to dent the firewall. You can still side your hand between the back of the distributor cap and the firewall. You can still pull your distributor without issue.
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I'm on the Instagram- @Gearhead_Kevin |
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#14 |
Registered User
Join Date: Jul 2013
Location: Winnsboro Texas
Posts: 367
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Re: Small block on 6 cylinder mounts?
I just put my engine in last night and I set in in the 6cyl position and had plenty of room. I have a tbi small cap but it looks like the bigger hei cap will fit.
I did it just to try and get my driveshaft as short as possible. I'm just wondering if it will make a difference in how the truck drives and handles? |
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#15 |
Registered User
![]() Join Date: Jun 2012
Location: Auburn Ca
Posts: 5
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Re: Small block on 6 cylinder mounts?
I am wanting to put a v8 on 6 cylinder mounts (rear mounting holes) with an big cap HEI
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#16 |
Registered User
Join Date: Jan 2013
Location: Mickleton, NJ
Posts: 1,776
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Re: Small block on 6 cylinder mounts?
This is a small block in the 6 cylinder mounting location with standard HEI cap. About 3/4" clearance on the firewall.
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__________________
Shawn 1970 Chevy C-10 SWB, 350, TKO 600 5 speed My build http://67-72chevytrucks.com/vboard/s...d.php?t=559881 |
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#17 |
Registered User
![]() Join Date: Jun 2012
Location: Auburn Ca
Posts: 5
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Re: Small block on 6 cylinder mounts?
Thanks Lattimer, that's the money shot right there. exactly what I was looking, John
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#18 |
Registered User
Join Date: Jul 2013
Location: Winnsboro Texas
Posts: 367
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Re: Small block on 6 cylinder mounts?
Other than clearance for exhaust, why do some people use the 6 cyl location? What are the advantages or disadvantages?
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#19 | |
Registered User
Join Date: Jan 2013
Location: Mickleton, NJ
Posts: 1,776
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Re: Small block on 6 cylinder mounts?
Quote:
1. Don't have to move the trans crossmember 2. Don't have to modify the driveshaft 3. Don't have to modify the clutch linkage 4. More room in front of engine for accessories, electric fans, etc. The only performance advantage is that it does shift weight toward the rear, so it can help handling a little bit. When I swapped in the TREMEC, I debated on moving my engine forward. I was getting a custom driveshaft and the kit came with a new crossmember that I had to locate. I have enough room in front for the fans and whatnot. A little more clearance at the back of the engine would make changing plug wires easier. Last straw was modifying the clutch linkage. Whoever installed the V-8 modified the L-6 Z-bar, and I would have had to do some fab to make it work in the forward position. Plus I would have had to mod my exhaust. Didn't seem worth it, so I put the engine right back where it was (I swapped the 327 for a crate 355 at the same time I did the TREMEC).
__________________
Shawn 1970 Chevy C-10 SWB, 350, TKO 600 5 speed My build http://67-72chevytrucks.com/vboard/s...d.php?t=559881 |
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#20 |
Registered User
Join Date: Jul 2013
Location: Winnsboro Texas
Posts: 367
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Re: Small block on 6 cylinder mounts?
Thanks lattimer. That's good info to know. That shorn is a purdy engine ya got there!
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#21 |
Registered User
Join Date: Jan 2013
Location: Mickleton, NJ
Posts: 1,776
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Re: Small block on 6 cylinder mounts?
Thanks. Unfortunately, that one came right back out. Started knocking after about 50 miles. Its still on the engine stand, I haven't gotten the courage to open it up. I got pissed off and bought a Vortec 355 crate motor and dropped it in.
__________________
Shawn 1970 Chevy C-10 SWB, 350, TKO 600 5 speed My build http://67-72chevytrucks.com/vboard/s...d.php?t=559881 |
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Tags |
6 cylinder, c10, small block, v8 mounts |
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