Okay, so life popped up there for a little bit, but I'm back to working on this. I mated the engine and transmission back together last night, and then I was able to slip the engine mounts into place... sort of. I ran out of time, but I still need to move the engine/transmission back about a half inch so that I can actually bolt the mounts to the block.
Then I'll install exhaust manifolds, A/C, P/S, and the starter, and then everything underneath should be finished.
Side note: where can I find a new dipstick? The tube is fine, but the dipstick itself has somehow been damaged.