[Excaliber]

I was running 667 flywheel horse with a fairly radical roller cam and 12.5 to 1 compression. George (Gessford) calculates I will be giving up about 150 horse with the new flat tappet and lower 9.8 to 1 compression (street motor this time).

I had the heads checked OK. BUT I'm thinking about having the exhaust port side milled to insure a good gasket seal on the exhaust side.

I'm still looking for "flow numbers" comparing Edelbrock heads to my original High Riser iron heads. I suspect there is not much difference, assuming both are "stock". Mine have not been "ported" per se, cleaned up is all. They have ENORMOUS ports.