Quote:

I can't see wanting a factory replacement head on a 408 for racing...Besides, the W2 was offered on at least one factory vehicle I can think of.




If you are talking about the original Little Red Truck that a magazine did a test on, it never made it into production.
It was a pre-production engineering test which may not have been sanctioned by Chrysler to begin with. W-2's never got any closer to a production vehicle than that.

As mentioned by others, the RHS heads won't have a problem getting into the 10's, especially with the open rules you have.