[Tom Goldman]

I've poured dozens of AMC heads over the years.
I melt old cast pistons in a cast iron fry pan over my turkey fryer burner .
the pan is small enough to handle the amount of aluminum you will need.
You must skim the dross off the top of the aluminum before pouring.
As far as prepping the head , the crossover port must be free of carbon to ensure proper filling.
I use furnace cement to block the port side for the fill, making sure its in the hole a little ,per the rules.
You can get a small tub of the cement at any hardware store ,and its relatively
easy to remove when your done .
It also helps to warm the head before the pour. ....I usually get them up to 225 deg. before I pour....This helps prevent shrinkage due to the rapid heat transfer to the head.