Good to see ya back, but Hmm, only comes around when he needs something, reminds me of my a$$hole brother.....lol > J/K
Sounds like you just about covered everything there bud, I do have a few suggestions though.
I had one do something similar to me one time and it was a loose wire on the HEI dist, the big orange "key on" wire was loose, pulled it off shoved back on, problem went away.
Also did that stud bugger up the carb any? I'd yank the carb off look at the transfer slots and butterflies and blow the thing out just for $hits adn giggles, maybe some thrash got in it while you were pulling the intake.
Just a FEW thoughts, Welcome back Popeye> Cp