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T-fish, are they 75cc heads? You inbox is full. Hit me up.

Yes, the heads work great. I have a 400 and just the RPM head and cam change got me close to a second in the quarter. Would a 470 benefit from a worked head. Yes! But just bolting on a set of RPM you will see improvement.

The VR1 that you find on the shelves that is street legal is holding the proper amount of zinc. Go here -->https://docs.google.com/viewer?url=http://www.valvoline.com/pdf/VR-1_Racing_Motor_Oil.pdf And it will bring up the break down of their SM rated VR1. Which according to the doc is...