A friend has a 55 2nd Series GMC with a good sized V8 in it, original to the truck, that had the V8 badging as well. How can i identify the size of the motor? I think it is the larger size which i think is a 318 V8 cu in Pontiac motor. It has the 4 barrel intake and carter carb. Has been sitting for a long time and i assume it is stuck. Any rarity to this engine if it is original? Thanks for the help.
