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I use the above cams and have no problem. Not much torque is lost. Pls chk cam timing. These cams should come marked if for the mechanical tappets. High comp pistons are for ppl that really know what they are doing. Replace stock 8v piston first. You may not have sufficient ignition advance due to your high comp. Resulting in super sluggish engine. I don't think your high end is very impressive either. How's the temperature?
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