So I bought a shortblock. Everything was going well. Built everything put her together and then go to put the flywheel on... doesn't fit. Tried other flywheels they don't fit either. It's like the bolt holes are just ever so slightly off a 16th to an 8th of an inch. The from my little knowledge and research the crank I have in it currently is a small journal 327 crank. Gm 4577 based on the 2 notch flange it assume it was a 65-67 forged crank. (I'm no guru so I could be wrong.) To my understanding any early sbc flywheel should fit, yet here we are. Even tried a later model truck flywheel. Nothing will work. I am lost and no one I know can seem to give me any help, so I'm hoping for some old knowledge here. Wtf is going on? I just want my car to run again.