Gasket sets. Pre 1985 and later than 1985?

lemondana said
Why are you using early heads on a roller cam block? Are you using a roller cam? Roller cam heads have .660 inch pushrod holes, where as the early heads only have .500 inch pushrod holes. If you use a roller cam, your pushrods will bind in the pushrod holes. If you are using a flet tappet cam-you are good to go. I would sure take advantage of the roller block by using a roller cam, don't have to worry about the dreaded cam break-in.

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.