I HAVE A 66 CHEVELLE 406 .30 OVER ON BORE IT TO ME OVER HEATS 215 225 AND IM WONERING IF ANY ONE HAS HAD THE SAME PROB. I HAVE A 4CORE RAD, AND A ELTC FAN ON THE CAR RUNNING ALU HEADS... LET ME KNOW WHAT YOU THINK OR IF YOUVE RAN INTO THIS PROP. ALSO USED WATER WETER THANKS GORDON