so after i finally got around to rebuilding the 450 i got about 10 hrs and started getting a coolant leak so i tore it back down to find out the gasket couldnt make he difference on the warped head anymore. wish i had noticed the warp before hand. any way now im looking for a head every where and cant find any decent ones at a decent price. so the next thought is shaving it to get it back in plain. i know its gonna up compression but is there any other issues. i havent seen anyone building this motor so wondering if it can handle it. also need to see if anyone knows a good place to order just the head gasket. having a hard time finding just the gasket or its pretty much the same price as the topend. im more of a snowmobile guy and really only planned on using this for house chores and hauling the ice ripper out on the lake