i have a tread about what octane i should use but heres a kicker the whole engine is a stock 1980 block with 1966 289 heads will the compression affect the internals of the engine like the rods crank bearings or pistons heres a list of exact whats in the 302
Engine bore is .030 over
Mains are .010 over
Cam is .010 over
The heads have a chamber of 54.5cc
a bonus the stock 250 289 302 starter doesnt have enough power to get it turning to start but i got it too sounds great but only had it running for a couple of secounds and turned it off. is there any strenght concerns regarding the fact every thing is a stock 1980 302 i believe i dont know if for sure it is fully stock but would it be fine with 11:1 if it is all stock?
11:1 sounds a little high on the compression. However, there's people running blowers, turbos and ALOT of nitrous to some stock bottom ends. Unless you're running the crap out of it, I believe you'll be ok.
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