Well I was removing the drive shaft and one of the bolts holding the u joint in the rear end broke off inside. Bran new American made bolts from local drive shaft shop. So I tried drilling it and using an easy out still no luck but while drilling messed up the threads. Wonderful. So now I either have to tap or try and find another yoke for the rear end. But if anyone has one that would be.much better then taping and rethreading. PS the new Oldsmobile 350 motor should be here soon. I also forgot to mention I snapped the head off the bolt holding the tail housing on the new 700r4.