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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!
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| | | | Joined: Feb 2007 Posts: 28 Apprentice | | Apprentice Joined: Feb 2007 Posts: 28 | Anyone mind helping me ID this GMC engine. Was in a 1950 GMC 1/2 ton.
Block # GMC 5 6107326
Head casting A245 6107412
the 245 might be 248? | | | | | Joined: Dec 2003 Posts: 2,733 Shop Shark | | Shop Shark Joined: Dec 2003 Posts: 2,733 | I think GMC enfines have the displacement cast into the RH side behind the distributor if I recall correctly. The 245 or 248 on the head would not indicate displacement. Also try the OldGMC website. | | | | | Joined: Oct 2001 Posts: 3,458 Extreme Gabster | | Extreme Gabster Joined: Oct 2001 Posts: 3,458 | Yes, look for the stamped serial number on the boss on the front driver's side of the block. It will start with 3 numbers, those are the displacement. If there are only three numbers, it was a replacement block and you were supposed to stamp the rest yourself to match up with the block you replaced, so you wouldn't have to change the title. From this site: http://www.oldgmctrucks.com/Photos/GMC_Numbers.htmYou have a 228, probably original to the truck.
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A lone amateur built the Ark. A large group of professionals built the Titanic. | | | | | Joined: Dec 2003 Posts: 2,733 Shop Shark | | Shop Shark Joined: Dec 2003 Posts: 2,733 | I looked it up and the block is a 39-52' 228. All the heads begin with 219xxx excpet for 2 which are both for the 228. | | | | | Joined: Feb 2007 Posts: 28 Apprentice | | Apprentice Joined: Feb 2007 Posts: 28 | Thank you everyone for the information. It is much appreciated along with the oldgmc website information. | | |
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