hey Aaron your best bet would be talking to somebody at cosworth (cosworth.com) or ford racing. i know that they have done quite a bit of research on the stock head as well as their own aftfermarket ones which are based off the stock head.
also try contacting:
Central Florida Motorsports (c-f-m.com)
Mcnews Automotive (mcnewsautomotive.com)
Focus-Power (focus-power.com)
and Focus Sport (focussport.com)
also try contacting:
Central Florida Motorsports (c-f-m.com)
Mcnews Automotive (mcnewsautomotive.com)
Focus-Power (focus-power.com)
and Focus Sport (focussport.com)
