Posted by clueless [201.202.24.94] on Tuesday, December 27, 2011 at 22:30:40 :
found this on a flathead forum
I have the image of altering the camshaft so the intake and exhaust valves are essentially switched, allowing more fuel/air delivery into the flathead, exhaust ports smaller anyway, so you would have six ports for intake and four ports exhaust, which is always a smaller volume compared to intake to start with.
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