i just ran my 02 426 today for the first time. (its 440, high compression, port and polish etc. i had a basically stock 426 before and i had no problem) when i get on it hard, 2nd or 3rd gear or higher and hold it pinned the head cover gasket blows. the 2 half circles pop right out. this ever happen to anyone? i dont know if its becasue of the higher compression and all or if the gasket just needs replaced. i doubt its cuz of the compression cuz i dont think there is much pressure ontop of the head. im going to get a gasket anyways but just wanderin if anyones seen it before.