Been a while since I've updated this, so here we go:
FINALLY got the engine back a couple weeks ago. The original block is .040" over, has 2 sleeves, but was saved. Heads also needed a fair amount of work, but they're good now too. Being the Olds 400 G blocks are not well liked, we actually went with SBM pistons/rings for it. The rods were reconditioned, and the wrist pin hole on the rod was bored out to fit the Mopar style pin (floating .984 vs pressed .980 IIRC). Picked up a custom Erson cam for it, and am just waiting on the assembly shop to call saying they're ready for it. They're going to assemble and dyno. I sent the original distributor off to be restored/recurved for the setup, Coan is building a converter for it, I need to make sure the intake/exhaust manifolds can be saved, and am hoping the Qjet that came with it can be reused/restored as well. I'm trying hard to get this as original as I can, aside from big cam/high converter.
The transmission was rebuilt in the fall, with a Transgo shift kit installed. He said about 80% of the internals were junk due to being stored outside with the dipstick out for who knows how long. The rear end wasn't in bad shape, but I went ahead and sent it off to JD Race to have it restored/add a posi unit as well. Just finished installing it, along with poly bushings out back, and putting the new wheels and tires on.
At this point, aside from the engine, I am going to put new bushings/springs in the front end, have the new fuel lines installed (I'm not set up to lift the body) and hopefully get to tearing the heater box out to make sure there are no dead mice in there (carcass count is up to 7 I believe). My hope is to have it back on the road by Memorial Day. It'll be a lot of work, but we're close.