Ah i see now. Now that is bad luck.
I would also ditch the oil cooler and tbh it don't even need a modine just a filter like a good old pinto.

Mine runs near that power and torque on std head bolts and a 94k engine. So once sorted it will be fine.

Are you using cams? Or just verniers to get timing spot on due the head skim or block face?

I always use blue loctite on cam sprockets just in case.