Quote:

Quote:

I did the opposite , machined the chambers so they were all the same depth considering the last set of heads I did the middle of the head was about .020 DEEPER than the ends of the head .

open chambers?. that's what I was going to have to do to a set of 906's if I hadn't found some 915's for a decent price.



Yes , 452's , they are a pair of Paul Rossi street fighter heads I bought in 1989, the worst of the 2 heads was an NOS casting.