Not that I have ever heard of, Mopar changed the crank pulley bolt pattern in either 1971 or 1972 from non symmetrical to symmetrical on all the V 8 motors. They didn't make and use different pulleys in the cast crank motors versus the forged steel crank motor That is probably due to cost and confusion on the assembly lines
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
That is probably due to cost and confusion on the assembly lines 
