I guess I'll have to find someone with a flowbenck LOL. 153/120 seem's a little low given the runner shape/size and comparing it to other's with more flow I have some ported 6X data that I have been using in my dyno prog, 244/150 @ .500 Guess they probibally are pretty close to them, given that they were 455HO heads
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Dan Pesonen
"If it ain't broke, modify somethin till it is"
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