55-9 I'm sure on. 48-54, not so much, though the 50 GMC 2.5 ton did have a 248 in it with the big port head. Not that it could be said it was original! www.oldgmctrucks.com is the best place to find ID info. Hard to navigate, but a wealth of info.


My 1955 GMC 450 Dump Truck
In the Stovebolt Gallery
Elderly Iron
"Performance" is the pursuit of a toy that won't break.