Hey guys, after much searching, I decided to bug you all with my question.
Does anyone know of a resource to compare chevy 6 cyl Hp / Torque ratings up to the mid /late 70's ?

I found much up till around 1960, not so much for later years.

I'm looking for a straight 6 for a rod project, probably a 250, but can't find a resource that'll tell me the ratings with respect to year.
I know they made a bigger 6 (292 ?), but a rare / expensive engine is not in the budget.
Thanks,
Rick in Florida.