Finally, my first 360 and goals for it! I'll be asking a lot of questions.

Called the shop today. Asked if they could take 1.01600 millimeters (0.040"). He was VERY sceptical about milling the heads that much. Said I'd run into trouble with the intake manifold and every other thing that has been mentioned here before. Sounded on him that he would not go that far. I told him I would remove the head gaskets, place the heads in place again and then the intake manifold to see how that would work.

I'm planning on using the thin Mr. Gasket Head Gaskets 1121G. Is that thinner then the stock gasket? How much would I need to take of the heads to even see a change in compression using the 1121G?