has anyone tried or heard of anyone trying to mod the engine.. besides the head gaskets and rods and pistons.. what about the cams?? whats the profile of the sled cams vs the bike cams??? im trying to put together a wish list for a sled.. im torn between the FI apex or the carbed rx-1.. and im torn between a bolt on turbo kit, or tearing into the engines internals? but for some direction, a apex with a simons turbo kit, stage 2 low and high boost(260hp-280hp) 136 track 1.25" hack or ripsaw, 4 tower clutch, extra head gasket,etc.. what about the valve train of the engine though.. this is a once in a lifetime sled, so it must last!!