Small block water pump pulley

Yes, it's from 66. I can't tell a 70 and newer from a 70 back. I just know the old stuff, lol.
Thank you much for your efforts, This one is 6 7/8" x 2 3/4" outside to outside. It didn't fit my 68 340 with a cast iron water pump is all I know for sure. I believe it should work with a aluminum water pump but not positive about that.