I got a 99 cobra pulling 456 at the rear with a P-1SC. Been running for 1 year. I have decided to forge the internals and also bore the 281 by .020" over.
I heard that an upgrade is like 1200-1300 dollars. Is this close?
Also, is the 6 rib setup Ok for a D-1SC or should I replace all pulleys and run an 8 rib setup? Thinking 12-14PSI and concerned with belt slippage at high RMPS.
J
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