You just need the pressure regulator valve & hose fitting for the volvoid as well as the metric threaded housing with the relevant bolt holes tapped. Once in a while the housings too worn?
Sometime ?85 the bypass pressure increased bit & directional valve on the rack got stiffer on some of them (like 4 racks per year & -?78 14mm spline & ?79+ 19mm spline
)
I just use/recombine guts from random chevys in OE quality early or late/no care except the pulley, housing, hose bits & pressure bypass valve & spring i press off & had to recycle from the Volvo?
I think with the late model square reservoir pump on the 240s the guts from the white block pump work even (not the pulley but gears & seals, yes!)
The rare bear (in USA & Canada) ?85-only non-a/c bracket doesn?t have any hooptie bushings to go bad & works reliably?
No mess or hoses/single belt stupid 7/9 accessory setups, can be made to work with the 91-93 pump with alternate stamped steel arms/clocking.
Re-use your low side rack banjo & low pressure hose, careful of the plastic hose barb on the integrated reservoir pump?
The early ?76-?84 bracket you basically have to straighten out the top 2 holes & make a reinforcing sleeve beteeen the top bushings with large diameter flexy thin stainless washers welded to the sleeve & use one long bolt up top with some sort of lock nut.
Then, the stupid thing will work seemingly without shattering or further babysitting with with OE rubber bushings in decent shape (raid the n/a 7/9s for dry under stressed bushings under the alt that doesn?t leakon the dead a/c compressor not doing much on -?92 models on cool weather pnw cars & flip them around/put some industrial heat shrink around them as needed / poly bushings too bouncy?) & get the right sized belt and some loc-tite for the bolts between the ?77-?84 Saginaw Pump & stamped steel arms .
You can usually find a Saginaw tear drop pump that?s still good/tight under the hood of a bunch of junkyard cars / grandmas & grandpas Oldsmobile with a serp belt & 50k miles on the SBC 4.3, 305 & 350 that gets driven to the bingo hall gently.