OLD Modified Corvettes

[Ed Wright]

Originally Posted by randy wilson

Bob, I actually have applied some of the rules from the old C\SM, and SS\CS. I never ran C\SM, but ran SS\CS for years, and ran D\EM, and C\EM IHRA. We weren't going to allow any porting on the Brodix spec head, and about the only difference is the tire size. The classes are close to the same, and might be interesting. The head potential is almost identical. As of now it's just an idea, nothing more.

The old C/SM head rules were cheaper than a set of Brodix heads. Had to be production iron heads. Stock valve stem size, only 1" below the valve seats, 1/2" back from the intake gasket surface to match the manifold. No welding or epoxy. We had more C/SM cars in class at Indy than in SS eliminator at many races today. Guys that liked to write big checks were no faster than guys with a clue what they were doing. You can hide more work in aluminium heads than iron. With the 1970s C/SM head rules there was no reason to send anything to Brodix, or anybody else, for verication.