You might look for a GMC 270 or 302. Both will look very similar to your 248 and should bolt up like they were put there by the factory (unless you get a military 302, which does have some differences).

I have a 270 in my 55, which came stock with the 248. Unless I tell someone, they can't tell without checking the casting or serial numbers.


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...