Thoughts on accepted aftermarket heads for 350?

[Mark Ugrich]

Originally Posted by Bobby Lundholm

Any modifications to the runners are illegal, so if they match up to the stock numbers NHRA will know they are modified.

So if I’m understanding this correctly , you must run the aluminum/ replacement heads in either stock or super stock using the runners as they come from the manufacturer. The exception being replacing the valves and seats with the correct OEM sizes?