Took the day off work and dropped the block off at the local shop this morning. In the meantime, I'm "fixing" what I tore up before. Originally I was going to swap this cross member to a Chevrolet cross member so the shorter 261 dropped in but I've since reversed direction. I had ground these rivets intending to punch them out but I'm now drilling the holes to accept 3/8-16 grade 8 bolts. I am also going to mock up a spare "bad" engine I have so I can get a driveshaft made.