rebuild suggestions

i am currently running a block that was milled .120 and a head with maybe .010 taken off it using the stock pushrods. its close but they work. next engine I will oder a shorter set for.

Hi, I am doing a rebuild as well. I have some questions if you don't mind. How thick is your head gasket? What spark plugs do you run? What is your initial advance? What was your break-in procedure? Can you still use 87 octane gas? Thanks