you'd wanna measure piston to wall clearance & might need to remove the ridge (a subject in itself) & mockup the main bearings & check journal clearance/end play & good chance you will be OK there but you cannot assume nothing & you want a solid foundation (long block) then any correctly selected add ons (intake/carb/ign/exhaust, will give you a spot on/kick azz engine with nothing left on the table. Mockup/measure & go from there.
Borescoped the 77 and didn't see a ridge. I was going to run my 68 with a small pit and some ring ridge until I noticed a little more ridge on the front of the #1 cylinder. So be it.
