PPM did my new engine and all I can say, I'm impressed what you can do and still be within the rules (NHRA Super Stock)
We have to use 2.08 and 1.74 valves and stock size runners, they flow MUCH I'll tell you.
But Peter will decide if he want to share the numbers.

During my 15 years of using 906 heads, none has ever cracked.

Last edited by MrSixpack; 07/01/12 03:27 PM.
1970 Super Stock Challenger ex. Paul Rossi
1968 Dodge Dart GT 340
1968 Dodge Charger /6 3 speed manual
1966 Chrysler 300 Loaded
1968 Dodge Charger R/T 440

1968 Mini Cooper