Another option is to use the cork gaskets with sealant on both sides of it. For me it is easier than a thick bead of Ultra Black Permatex. Also, I now use Right Stuff as a sealant instead. The reason is that Right Stuff dries much faster and comes off much easier later if needed. It costs more.
My process is to put a thin layer of Right Stuff onto a clean china wall, then put the cork onto that and then set the manifold onto the engine to press the the cork down into sealant. I use the cutoff guide bolts as well for this (thank you Marlin). After an hour or so, I pull the manifold and put another layer of Right Stuff on top of the cork and do the final install of the manifold.
I use the tube of Right Stuff, not the pressurized gizmo.
I have done this many times on Panteras and do not have leaks.
