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#1 |
My truck is in pieces!
Join Date: Oct 2006
Location: Abbotsford BC Canada
Posts: 143
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How to restore an inline6??
Has anyone tackled this yet? I am trying to decide to rebuild my 292 or just go find a 350 to rebuild. I have read many threads with pros and cons to both and my main concern is I don't want my long bed to be that much of a sleeper with the 6.
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#2 |
Registered User
Join Date: Jan 2006
Location: Dallas
Posts: 504
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Re: How to restore an inline6??
You can really get some power out of a 292, but some of the hi performance parts are pretty expensive (intake/headers) and some parts are getting difficult to find (power steering). You also have to deal witrh people jacking with you for having an inline too. A 350 would be easier as far as getting parts and stuff, but there is alot involved with the swap to a V8 itself that you will want to take into consideration (motor mount perches, etc). Sounds like you might be leaning toward a V8, you can build a 292 to scream though, and that will really blow people's minds too.
Off topic: Is it me or have there been alot of inline 6 posts showing up lately! That is cool! ![]()
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_______________ Thomas '78 Silverado '74 Monte Carlo '47 Teardrop Trailer East Texas Classics Local Club |
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#3 |
Registered User
Join Date: Jun 2002
Location: Fort Worth, TX
Posts: 920
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Re: How to restore an inline6??
I kept the 250 in my 69 stepside. Rebuilt to mostly stock specs. Runs great. This is a truck I just fart around in on weekends but i'm a big fan of the inlines. If you keep oil and plugs in them they last forever. Don't know if this answers your question.
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#4 | |
FarmBoy.
Join Date: Feb 2005
Location: Rhinelander, WI
Posts: 1,103
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Re: How to restore an inline6??
personally, i say keep the 292.
it's a torque monster, and a work horse. i have both a I6 and a V8, and granted, the 292 seized up from reasons unknown, but, i still love my 6's. if you're willing to do work, making a 6 put out some decent power isn't all that difficult. it can just be expensive, unless you find the right deals. when i was still buying 6 parts, i picked up a set of long tube headers for 60 bucks including shipping off EvilBay. then a 3x1 triple single Offenhauser intake for around 60 off of Inliners.org. so right there, around 120 bucks for two bolt ons that help it breathe better, which is always the issue with these engines. andd...yea. sorry to be long winded. basically, shop for deals, and limit it to bolt ons for simplicity. you could find a 194 head, to bump compression. or LP propane pistons to bump compression to 9:1. but...then you're talking more money, etc. *cough* keep the six! *cough*. -Sam. ![]() P.S. if you haven't already, pickup Leo Santucci's power manual for the GM inline six. it's worth it's weight in gold as far as performance goes, plus touches on alot of good basic advice for a rebuild.
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1969 GMC C1500. long fleet. 307. 3 on the tree. 3.07 gears. Oliver green. Bent and bruised. Daily Driver. Quote:
http://67-72chevytrucks.com/vboard/s...d.php?t=242993 Last edited by samwise68; 07-27-2007 at 01:09 PM. Reason: forgot a main point.. |
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#5 |
ASE Certified Spoon Operator
Join Date: Oct 2006
Location: Colorado Springs, CO
Posts: 157
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Re: How to restore an inline6??
check out cliffordperformance.net, got their header and intake for my 292, planning on a cam and MAYBE .030 over for total disp of 310 inches. That's why "My six ix bigger than your eight." The cam has 0.10 more lift than factory so there's much better breathing combined with the huge single plane intake and headers. Need a 500 cfm carb to replace that stompin' 1 barrel.
Besides, V8 swaps are so common... people usually don't know what the engine is if the cylinders are in a line. One dude asked me if it was a 300 engine from a F**D!! ![]() -Dan
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My six is bigger than your eight ![]() 67 K20 292 +.060" SM465 NP203 3.73s 86 4Runner, the daily on 31s 85 4Runner, the wheeler on 38s 92 x-cab truggy project for 2017... tons and 42s and V8 power ![]() |
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#6 |
My truck is in pieces!
Join Date: Oct 2006
Location: Abbotsford BC Canada
Posts: 143
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Re: How to restore an inline6??
Well I don't mind spending more to restore my original 6. My truck is a long bed and I just hope I can get enough power out of the 6. It had the original 4spd (high hump). Now how hard would it be to convert the tranny over to an automatic. keep in mind I am currently down to the frame and doing a complete rebuild.
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#7 | |
ASE Certified Spoon Operator
Join Date: Oct 2006
Location: Colorado Springs, CO
Posts: 157
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Re: How to restore an inline6??
Quote:
Since yours is 2wd I bet you'll get plenty of oomph out of it. As for going automatic I'm not any sort of expert so I guess you'd need the auto trans x-member and different legnth drive shaft? Speedo cable? Low hump floor cover, or a Lokar auto floor shifter to keep the high hump? Just throwing this out there... -Dan
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My six is bigger than your eight ![]() 67 K20 292 +.060" SM465 NP203 3.73s 86 4Runner, the daily on 31s 85 4Runner, the wheeler on 38s 92 x-cab truggy project for 2017... tons and 42s and V8 power ![]() |
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#8 |
Official Site Guitar Shredder
Join Date: May 2006
Location: Oz
Posts: 3,955
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Re: How to restore an inline6??
i love my 292 3 speed. it sees 150 200 miles a week.its in my 67lwb, has great power is so so on gas. now it doesnt have a ton of power but i can make it run hard . it passed just fine, and it will tear the he11 out of the right rear. id say keep it
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#9 |
I am a Referee of life.
Join Date: Jun 2000
Location: Greensboro N.C.
Posts: 13,993
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Re: How to restore an inline6??
Big 6 fan here.If you want a 350 the n that would be the way to go because you will spend more$$ for less power in the 6.That said,when was the last time you saw a 6 at a car show that wasn't in a resto?It seems like the greatest engine ever built (the smallblock) has become the bellybutton of classics and rods of all types.
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The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil" |
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#10 |
chrome makes it go FASTER!
Join Date: Feb 2007
Location: Cleveland Tennessee
Posts: 2,884
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Re: How to restore an inline6??
Several other members have gone with the six rebuild instead of v-8 and I've not heard any complaints. Deals on parts can be found it just takes some looking. I like it when I pop the hood and someone says "wow, it's still got the six cylinder, those are hard to find!" Plus a burnout from a six is just too cool
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She can't cook and she won't clean. But she looks good in a skirt and she brings me beer. She can stay for now. EDIT:: But she left me anyway, So forget her. 1962 GMC Stepside V6 4 speed My rolling resto thread http://67-72chevytrucks.com/vboard/s...d.php?t=324226 My old farm truck http://67-72chevytrucks.com/vboard/s...=1#post3465005 |
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#11 |
Hunting is Life
Join Date: Jun 2005
Location: Buffalo,MN
Posts: 115
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Re: How to restore an inline6??
I'm also rebuilding a 292 l6
pat dare to be diffrent
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1970 GMC K-1500 4x4 292 I-6 3 on the tree-prodject truck ![]() 1971GMC 2500 2wd 350-v8 sm465 4spd-parts truck ![]() 2005 Ford Ranger 4.0/5spd auto 4x4 extended cab--everyday driver bought new ![]() ![]() |
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#12 |
Registered User
Join Date: Jan 2006
Location: Dallas
Posts: 504
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Re: How to restore an inline6??
Yeah going auto isn't too much of a problem at all, just gathering the parts is all. My truck was a manual tranny and the PO did the swap, he actually cut the OEM crossmember out with a plasma cutter
![]() As far as power goes, I just put a new carb on it a few minutes ago, and with my used, bone stock, 250 engine/ new 400 tranny, and highway gears in the rear, I just laid massive tread on the ground in the parking lot across the street. This is my second inline 6 in this truck and this engine has some miles on it but it is fine, the last engine had a bad compression ring but it was a VERY fresh rebuild and it would wrap up and lurch pretty hard shifting gears. I can't even imagine what a hopped up 292 could do...
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_______________ Thomas '78 Silverado '74 Monte Carlo '47 Teardrop Trailer East Texas Classics Local Club |
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#13 |
Senior Member
![]() Join Date: Feb 2002
Location: Tucson, AZ USA
Posts: 7,285
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Re: How to restore an inline6??
I've built two 292s, so far. Once in '77 and again in '02 -'05. I spent about $1000 back in '77 and an undisclosed amount more recently. Money well spent. I like L6s, they last forever.
By the way, a 292 bored .030 over yeilds 296 actual cubic inches. At .060 over it's 301.
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Every 25 years I like to rebuild that 292, whether it needs it or not. |
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#14 |
Active Member
![]() Join Date: Nov 2005
Location: Austin
Posts: 217
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Re: How to restore an inline6??
If you aren't going for performance, rebuilding a 292 is pretty cheap. I had mine completely rebuilt for $800.
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#15 |
ASE Certified Spoon Operator
Join Date: Oct 2006
Location: Colorado Springs, CO
Posts: 157
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Re: How to restore an inline6??
Thanks for setting me straight, I'm not good at math and such. Maybe it was with a stroke? I mean like a .030 overbore and a...?? stroke that made the 310 inches? I have no idea but I'm going to do SOMEthing to my 292...
Dan
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My six is bigger than your eight ![]() 67 K20 292 +.060" SM465 NP203 3.73s 86 4Runner, the daily on 31s 85 4Runner, the wheeler on 38s 92 x-cab truggy project for 2017... tons and 42s and V8 power ![]() Last edited by ks147j111928; 12-28-2007 at 03:55 PM. |
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#16 |
Registered User
Join Date: Oct 2007
Location: Garageless, Missouri
Posts: 408
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Re: How to restore an inline6??
The only thing that ever took out any six I ever had was a cracked vacuum line from power-glide to the intake runner burning a hole it the rear piston creating quite a fog machine. A guy once asked me why I put a small block in it and he said that that same thing happened to his dad when he had it. The small block exchange finally found the cracked line. It was a 68 inline six with factory power-glide. A real treat to drive and low center hump.
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R.I.P ESLL Even as the body dies the spirit lives on in the people you touched |
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#17 |
krazy hillbilly from Kentucky
Join Date: Feb 2007
Location: Paris, IL
Posts: 121
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Re: How to restore an inline6??
I'm with everyone else on this one...build the 292. After 20 years in the auto repair and high performance area, I've found out one thing...if it's got a GM on it anywhere, you can make it run with the best of them...the old ones anyway. The 292 is very similar to the Wakashaw blocks in the late 40's and 50's Oliver 88 tractors. We built and pulled antique tractors for years and our engine of choice were the old Oliver 88s. There is a lot there to be played with. We had a 1/4 inch of stroke put in, .060 pistons, worked the head over massively, by the time we were done we were running stainless steel valves for a BBC, jesel roller rocker system, had to grind the block out to clear the lobes on the cam, and double valve springs for a BB Hemi. Grab you a book on high performance written by David Vizard and apply his SBC tricks to your 292, you'll be pleasantly surprised. Keep the 6, let 'er breath, make 'er scream.
P.s. I've seen a 292 run 10's in 1/4 in a 1/2 ton long bed pickup.
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1969 Chevy CST/10 "Old School lives and breathes in the heart of a chosen few ![]() 1984 Chevy C10 Silverado "Life, Liberty, and Ford's Pursuit of Chevy taillights" You say "Obsessed with my trucks" like it's a bad thing |
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#18 |
Registered User
Join Date: May 2007
Location: Moore, Oklahoma
Posts: 2,396
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Re: How to restore an inline6??
Re-do the 292, or get a big block. Small blocks are excellent motors and i have had a few of them, but they are boring (if your building a DD, boring and reliable is ok) --- for a weekend toy, build something with a little "wow" factor when you pop the hood
Either a straight 6, or a fender to fender big block will do it 6's look awesome with a Clifford header and a Weber sidedraft carb arrangement, and dont forget a big 'ol finned valve cover
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Are you retired too? Nonsense! I'm in my prime Last edited by streetstar; 12-29-2007 at 10:43 AM. |
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