Advice Needed - Can't Start Rebuilt 273

I had the same problem, once , with 180 out. I think that is solved.
To adjust the valves, for sure; just for starting:plugs out.
Pull the covers, get #1 correct, then turn the engine over with a socket. Put a short piece of wire (solid #12) in the hole; watch the intake valve- as it closes, and the wire stops coming up, spin the crank a little more- you are on base circle; adjust lash. Repeat for all.
Then start it, with towels on the rockers, and final adjust.