ok im gettin ready to put my banshee back together. i am boring it .30 over with new wiseco piston and rings new wrist pins and bearings the usual stuff you would replac eon a top end rebuild im also lookin to have the head shaved how far can i cut it and not have to worry about getting the chambers re shaped i was thinkin .30. also puttins on pro circuit pipes and silencers and new reeds. what kinda of compression wuill i have with the shaved head at about 500above sea level and also what kind of jeeting will i need? thanks for any help i tried the search button