[deuce_roadster]

I always use sealant on the stud threads and for my initial run up start it with NO coolant in it and get it up to a temp where it feels too hot for my hand on the head and shut it off. Let sit overnight, Retorque, fire it up again, run it up to temp, shut off, let sit overnight, retorque.
After the 3rd cycle when cold after retorquing, I put the coolant in and then run it.
Aluminum heads should be torqued when cold, cast iron when hot.