It's tough to mount a p/s pump on a bolt if you are running a/c and an alternator on the driverside. That's why I went with the dual diaprhagm vacuum booster and t-5. With the saginaw I think your only option is the hydroboost.

If you've got a/c you could rig a mount on the passanger side using the timing cover and the side engine mount holes in the block.

Then you'd need to modify the crank pulley or find a two groove one.

I've been planning to add power steering and when I do, I'll grind off the rivets holding the single groove on the original crank pulley and then bolt on a two groove 7" pulley I'll salvage from a boneyard. I think the stock crank pulley is 7.25" in diameter, but 7" is more common and shouldn't make much of a difference in driving the water pump, a/c, alternator or p/s pump.

Best of luck!

'51 Chevy 1/2 ton w/'62 261, HEI, offy, fentons, dual carter/webbers, t-5 & 12 bolt posi