[67C10Step]

Here is the best photo I got from my setup, which I have to believe is stock as everything else under the hood was when I go the truck.

The lower bracket does connect to the water pump with a stud and my digital caliper showed 0.214" from water pump face to backside of bracket. The alternator belt looks like it is not running square but I think that is just an oddity of the angle of the photo. I've driven this truck over 3000 miles since getting it running with this setup.

You will also notice my truck has power steering. That was a recent addition with and Alan Grove power steering pump bracket and add on crank pulley. I'd recommend Alan Grove as everything fit like a champ.

If you need more measurements, let me know.