I finally have it back!!! The engine was partially rebuilt using a 1978 2F block. It was resealed and the best parts from my engine and the "new" block were used. The head was machined. The steering was upgraded to Saginaw.
I've put about 300 miles on it in the last week and overall it's been great. I still have exhaust fumes getting into the cabin and that is the next issue I need to tackle. While my mechanic had it, he removed the cat and welded in a straight pipe because he thought it might be leaking from there. It's certainly not as bad, but the fumes are still in the cabin, most notable when the heat is on. I've read countless threads on this and it appears it can be a million things. First, i am going to check on the steering shaft seal as I see that this is a common way that exhaust gets into the cabin. After that, I'm not sure where to go. I am quickly running out of budget and can't just throw a whole new exhaust on it hoping that will fix it. Any suggestions here would be helpful.