OK - per my 1991 FSM (the 1992 is in bits - I need to get it rebound...) it looks like you've got the pivot bolt and the adjustment bolt up front, two pump-to-bracket bolts down back, and the adjustment bolt. Sounds kinda like my RENIX after all!
All the bolts you have to loosen to adjust/change the belt need to come out - so that looks like four bolts that thread into the pump proper, and maybe the adjustment bolt (which I usually remove so I can put a new coat of Never-Seez on it anyhow.) Once you get all four bolts out, the pump should "tip forward" out of the bracket and let you remove it. I had to change my PS pump last night, in fact - took me about an hour all up. That included removing the airbox (gave me a little room,) and changing the pressed-on pully over - without power tools.
Check your pully hub - if there's a flange there, you'll need a power steering pully puller. Usually $20-30, you drive the thing with a wrench, and you can (carefully!) clamp the pully in a vise to keep it from spinning. The new pump probably has a bolt, nut, and washer with it - that's the "install tool."
Lightly grease the pump shaft and/or pully hub before you press it on, and it should go easily.
I've done more of these than I care to think about, and it's usually an easy job on 4WD/RWD vehilcles, or the Caddy FWD with the THM425 transaxle (since it lets the engine go in the right way round, and not sideways.)
5-90