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Frank;
The heads I used were the cast iron N351 Ford Sportsman heads. I'm told that the cast iron heads work better with lower compression engines (under 10:1). I'd like to try to run this thing on pump gas. I tried the AFR heads with the 185cc intake ports, 2.02 valves, 1.60 exhaust valves as well as Brodix heads with the 2.08 intake valves and 1.6 exhaust valves. They both gave slightly more horsepower but at higher RPM. I didn't try the Ford GT40 heads. The intake used is a dual plane. Single plane gives more horsepower but again at higher RPM.
Thanks,
H Dog
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