Hello all. I bought an engine from a junk yard that is supposed to be a 1985 302. I pulled the torque specs offline for the bottom end and began my torquing. I snapped a main cap bolt on the first cap I tried to torque. I called the local speed shop and was informed that the torque spec should be 70 ft/lbs instead of the 105 ft/lbs that I had torqued to. Upon further research online I found that the 85 302's are H.O. (high output) and the pre 85 302's are not. The torque spec I was using was for the H.O. and the torque spec I was given by the speed shop was for an earlier engine.

My question is this. How do I verify that this is indeed an 85 H.O. engine? I really don't feel comfortable trusting the word of a junkyard.

An additional question I would likeanswered is; what are the differences in the two engines? Just a general description is fine.

Thanks again