Gasket sets. Pre 1985 and later than 1985?

Gasket sets. Pre 1985 and later than 1985?

Ask your machinist on enlarging the holes, I'm not sure if it's possible. I think aftermarket aluminum heads have oval pushrod holes.

Bronze Barracuda said
What! I've never heard of this! Yes I definitely want to use a roller cam! I had a really good set of heads from a 1975 truck. Damn. Can I drill the holes out a little to be able to accommodate the pushrods if I were to use a roller cam. I seriously never knew about this.