HG install techniques

[Wizard]

That's what a gasket is for. It conforms to the irregularities and makes a seal. I have never used copper spray on anything other than MLS gaskets. As for a freshly prepped black and head.....you simply have to have it cleaned of any old gasket material. If you have never overheated the motor, then your surface are probably flat enough to seal tightly. I'm not saying you can't use copper spray....it's just not required. Kinda of like using silicone along with your valve cover gaskets. Which, I also do not recc. Ever seen what silicone does in oil? Nothing. It just clogs up the pickup screen and lowers your oil pressure. Seen it a lot on SBCs.

Wiz