Completed the install today. Smooth as butter with my brand new 33x10.50x15 MUDs. Couple of pointers that might help the next guy.
1) did not remove my smog pump. Fully smoged...its tight but doable.
2) after cutting & grinding, mounted the pump to the OEM bracket. Then installed bracket & pump together.
3) don't try to 'tap' the pulley on. It's too tight of a fit & you will damage the pump. Buy a press on pulley kit or make one. I made one for about $3 & it worked perfect.
4) here is how I made it. 4" full threaded grade 8 bolt...3/8 x16. Heavy duty, very thick washer...mine was about the thickness of 2 nickels stacked, 1 nut to go on the bolt. The nut pushes the washer down, onto the pulley & onto the shaft. I used a bit of grease.
5) don't fully seat the pulley, almost but not quite. I left the space of about the thickness of a nickel.
6) at 1st my pump was moaning. Air in the system. Lift the front end off the ground and with engine OFF, slowly go lock to lock 20-30 times. Keep checking your fluid level. Air should be gone.
7) I used syn ATF fluid.
8) the pump I used was from Oreillys #732-2137.
9) cap was Dormans #82581.
I wheel quite a bit. In the last 4 years I've gone thru 4 used OEM pumps. I'm thinking this Saginaw will last a long while...and if it goes out, a replacement is $55.