Lotsa variables. I'm assuming 455? This might help: 1970 Pulleys without A/C should be: Water Pump # 1375141 Crank # 1375142 1970 Pulleys with A/C should be: Water Pump # 1375146 Crank # 1375143 1971 & 72 Without A/C should be: Water Pump # 1238156 Crank # 1235779 1971 & 72 With A/C should be: Water Pump # 1235778 Crank # 1235777 71 & 72 Motors with A/C would have the LONG Shaft Water Pump Jim
