Here is some more good info for anyone else in the future reading this later on with the same pulleys and needing info.
https://67-72chevytrucks.com/vboard/...d.php?t=508169
Looks like I do not have the correct fan blade. Should be part number 3883159 and 5 blade. I have a 7 blade that looks identical except the blade count. I wonder if the pitch of the blades could be different and the original and would stick out the back?
Edit.....But then I look and my power steering pulley nut is only 1.5 inches fromm fan so it probably shouldn't come back too much more.