Pulley Alignment

Garrett Ellison said
Products: Pulleys - Bouchillon Performance Engineering

That site doesn't list the correct water pump size, only 6 7/8.

I found this thread: Pulley Diameters and post #14 has what I am going to search for. A 7 1/4 crank with a 6 5/8 water pump pulley, from a 71 318.