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Mod | | | Forums66 Topics128,104 Posts1,056,201 Members48,436 | | 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: Sep 2006 Posts: 74 Wrench Fetcher | | Wrench Fetcher Joined: Sep 2006 Posts: 74 | Folks -
The missus and I have found a 46 jimmy.... It was running when they parked it - in 1994... We haven't yet taken possession, but are looking for some input.
The PO says the engine smokes a bit. I assume that it is a "pounder" with babbett bearings. Should I replace the engine with a newer, full pressure 6, or stick with stock? The truck is pretty much complete and stock, so I'm torn.
If I do go with a more recent engine, what year and size would be best? I do want to keep it with a six, so....
I'd appreciate any advice, caution etc.....
John | | | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | Unless the engine has been swapped for a Chevrolet 216/early 235, it will be a full pressure engine, as GMC had their own engine at that time.
Bill Burmeister
| | | | | Joined: Nov 2000 Posts: 1,969 'Bolter | | 'Bolter Joined: Nov 2000 Posts: 1,969 | 228 likely. Next time you look at it try to see the stamped serial number on the flat pad beside the distributor. The first digits are the displacement. And it will have GMC in an oval on the valve cover. Unless it's Canadian... Cruise on over to our friends at http://www.oldgmctrucks.com/ and join their forum, post an intro, then post your questions. Good luck! Oh, if you buy it post some pictures of it. We love old truck pics. 
Professional Novice
| | | | | Joined: Feb 2006 Posts: 1,867 Shop Shark | | Shop Shark Joined: Feb 2006 Posts: 1,867 | Scrape down the pad by the distributor to find out the engine size if it's a GMC engine. If it's a GMC engine, the first 3 digits will denote its size, eg; 228, 236, 248, 256, 270, 302.
The GMC engines are great engines.
As Frank mentions, we love pics!
Jeff | | |
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