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  1. RCK850

    Unported head quickness?

    73 Duster full interior street car weight is around 3200lbs. .030 over 440 with stock 906 heads 2.08/1.74 valves. schumacher headers, 800 holley, .528 MP cam. compression is probably 10:1. Best run was a 12.3 @ 109 that was with the MP.484 cam. I recently found out the throttle was not opening...
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