Quote:
Originally Posted by 5389stk
Question who actually submitted all these heads to NHRA or did NHRA pick them out. All these heads cc way to big to be used in stock.
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Can't answer that. The AFR 1399 aluminum head is NHRA approved for SS, but it ships with 1.9 and 1.6 valves installed. Larger than the Ford heads it's approved to replace. You would have to knock the valve size down to pass a SS tear down. I wasted a couple of grand on believing the Approved list, so be careful.
AFR `1399
58cc
valves 1.9/1.6
I runner 165cc
E runner 68cc
c8oe f J code 302/230
49.5cc
valves 1.783/1.457
I runner 130cc
E runner 49cc
Got iron heads now.