If you look at picture of Engine 1 in my above post, there are 2 studs exactly where you suggest. One is holding the metal tab for lifting the engine.
Here is another picture with the metal tab removed.
Engine 3 These were on my 57 truck motor when we found it. It had no bracket or anything attached to it, but there were 2 studs there. That is where I figured a second bracket could be installed.
I have wondered about installing an alternator up high with 2 pulleys and then the PS pump below it off of the second groove in the alternator. As long as both grooves are the same diameter on the alternator, the belt will be traveleing the same speed as if the PS pump was driven off the crank. I didn't know about the load on the alternator shaft, but otherwise it could work.
