A little off the topic but Permatex Black also works good for the intake to block seal. Toss the ones they give you in the gasket set and lay thick bead on the block between the heads. If you use some long studs or all thread in the front and rear manifold bolt holes the intake will drop right the 1st time making a good seal with the Prematex. Put the rest of the manifold bolts in then pull the studs out.
Rick