How long you running?Porting is a must you best beleive everyone else is!Drag pipe,bigger carb,tranny,clutch.My buddy has had alot of luck with turbo marks on the crank to throw fuel,reeds,mill the shit out of the head.What class are you looking to get into.You need to call a site sponsor send them the motor have it degreed to see how far you can go,have it ported for all out drag if thats whats going on.I dont see why 40hp is not obtainable with the rite cash flow