I agree with Pat about painting not only the intake surfaces but any surface that gets a gaslet or seal--REPEATEDLY when we are dealing with some one who has a vacume leak or oil drip its because of painted surfaces--In todays chemical world there is no way you want to mix paint and any gasket sealer and hope for a seal-----------

Also regular(not hi temp ) paint will burn off the exhaust port areas, especially Olds,FE fords, Cadilacs--any that the port area is sort of raised and extended