The 292 is not that uncommon in 3/4 ton and up but P/S on one is. 250 P/S brackets are very common and can be modified to fit. Camaro, Nova, mid-size Olds, Pontiac and Buick through the '70s used the 250 and most had P/S. You have to cut it apart and weld in an extra piece and other changes such as clearance for the by-pass hose.
The scan below is from a Chilton, but just says in-line. They don't show the Alt belt.
Chilton scan Getting the right pulleys may be a bigger problem than the brackets depending on the balancer and alternator you now have. Get everything and if you are lucky, some of it may work.
My setup I don't know who the engine below belongs to, but they posted the picture here a couple of years ago. The bracket they made would be easier to make than the modifications to a 250 bracket. The original alternator bracket bolts to the top of it and moves the alt up only a couple of inches. The pulley arrangement would also be easier.
To do it again, I would go this route.
Better setup I don't know what his pump is off of. Most of the newer systems have "O" ring connectors and metric threads. Keep that in mind and be sure you know which style your steering box is.
I don't know how to tell by just looking, but some of the truck steering boxes are fast ratio and are a big improvement even over the standard P/S. If I remember correctly, mine came off a late '70s, 1 T, 4-door work truck.
The old manual steering with three and a half feet diameter wheel was a real [censored] for slow speed manuvering. I lucked out and found a box with 3.5 turns lock-to-lock. A small diameter, fat wheel from a Z24 Cavalier, which accepted the GMC horn button with a slight trim is perfect. Steering at speed is also perfect.
