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This question will probably sound really dumb, but how much vacuum would a stock PVC setup and the stock breather to air cleaner tube put on the crancase in comparison with an evac setup on the headers?



It depends on the cam being used. But at full throttle, there should be >3" hg.


4 speed street legal. Best time 10.99 @ 124 mph on 93 octane pump gas @ 3926# total weight