Might take your advice Kerry. And yes I put a very light coat of ARP lube on the threads going into the block, just so they aren't going in bone dry. Most the lube ends up on the top threads.
So today I decided I'm sick of waiting for my head and going to move forward. Using some old headstuds (thanks for the idea Momin), I put the motor back up on the hoist. Took the flywheel off. Bolted up the adapter plate. Started to put the flexplate on. Shot Collins (adapter maker) an email about how exactly this flywheel adapter is supposed to go on. Calling it a night, will get back to it tomorrow and over the weekend!
Adapter on and flex plate on with bolts finger tight:
3 sets of hardware that came with the flywheel adapter. Pretty sure he said to just use one set, which will replace the actual flexplate bolts. waiting for confirmation