Welcome to the Stovebolt Tony!

A '54 would have been a GMC 248 originally. and the model would be 100 not 3100. The 235 and 3100 model designation are both Chevy.

If its a GMC motor it will have a serial number behind the distributor near the starter. The first three characters will be the engine size.

My '55 1st GMC has a 248 from the factory, but had a GMC 270 when I bought 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...