identifying a Chevy 350 block and Trans

[Clarence L.Snyder]

I don't follow your logic, Clarence.

I have two C-50 Chevy trucks with 350 engines and both have 2 barrel
Rochesters. Dunno how many bolts on the main caps, tho.

Up here most 350 truck engines were 4bbl 4 bolt, very few if any 4 bolts
had 2 bbls. There were undoubtably some 350 2 bbl trucks, and likely
some 4bbl 2 bolt truck engines as well, but odds are in your favour of
4bbl truck engines to be 4 bolt, and also for 4 bbl 4 bolts to be truck
engines. For putting out moderately serious power without extensive
modifications, the truck engine lends itself well to the task.