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with the 4.080 bore i can not run the big valves i have to run the 2.09 and 1.65 exaust . all the charts i see for the flow are based off the 2.19 intake valve. my 342 made 343 rwhp and 321 rear wheel tourque on a dyno jet dyno. kc said my motor should make 525 hp at the flywheel with the right heads?.
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