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Message: <blockquote data-quote="96blak54" data-source="post: 1226056" data-attributes="member: 14727">Looks to be a good plan. You can upgrade the stock valves to a flatter face valve or cut the rim off the stock valve. The stock pi valves have a cupped face and by cutting it off adds more room.This will add a lot of clearance  for more cam profile. Doing this along with piston notching and you can run a crazy cam or just add more clearance. I would not suggest any more intake duration above 262Âº with the stock stuff. Others will chime in with their claims of running more cam with the "proper" degreeing with stock valves and no piston notches. Degreeing any cams is a must, but stay in the degree of what the manufacturer produced for you.</blockquote>