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7 members (Wickedbass, MRMEROTH11, GradyB, SWEET, TexasJim50, klhansen, TUTS 59),
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Global Mod,
Mod | | | Forums66 Topics128,066 Posts1,055,873 Members48,428 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
| | THANKS!
For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Aug 2008 Posts: 9 New Guy | | New Guy Joined: Aug 2008 Posts: 9 | OK I just spent too much money putting clutch and brakes in my 1957 350 gmc, first time out the engine takes a dump. I,m tempted to cut it up for scrap(but temper tantrums don't help) . Is there a later model engine swap that doesn't invole major rework? Oh ,it has pontiac v8 now. | | | | | Joined: Mar 2009 Posts: 169 Shop Shark | | Shop Shark Joined: Mar 2009 Posts: 169 | what is the pontiac engine that is in it now and is it origional? i have seen older gms from that era with poncho engines before,in gms version of the cameo timbuk | | | | | Joined: Aug 2008 Posts: 9 New Guy | | New Guy Joined: Aug 2008 Posts: 9 | The truck is totally factory stock, 347? pontiac engine. | | | | | Joined: Mar 2009 Posts: 169 Shop Shark | | Shop Shark Joined: Mar 2009 Posts: 169 | that sounds about right you will problably have to change your bell housing to go to a chevy engine you may be able to reuse your clutch but you would need a different flywheel it all depends on the bellhousing bolt pattern not to familar with the old poncho engines-do not know if the ones from the 60s are the same bolt pattern-you will need to research....timbuk | | | | | Joined: Oct 2003 Posts: 5,152 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Oct 2003 Posts: 5,152 | That motor became the 389, 400, 455, so I would expect any of those could easily be adapted to fit.
There are some differences between the motors externally, and I'm not an expert so I can't tell you want they are. At one time I toyed with dressing a Pontiac 455 as a 347 for a truck project, and my conclusion was it could be done as long as no one who really knew Pontiac motors was looking at it.
1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more...
It's true. I really don't do anything but browse the Internet looking for trouble... | | |
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