Hi all, I'm new to the forum and I just got a 60's something Chevy 10 Stepvan (P10 I think). I've identified the engine blcok as a GM 3877178 which is I guess a 235 or 250 cid. according to the casting number list on this website. I'm having trouble identifying the year of the engine and consequently what kind of carb I need for it and the correct compression numbers for the cylinders. Can anyone point me in the right direction?