Just check the specs of the pump suit the box...
I had a PAS pump on an Isuzu 4BE1 (not the "D") crack the rover 3-bolt box housing. The power steering specialist believes it was because the pressure from the Isuzu pump was too high. They modified the pump somehow to reduce pressure and replaced the box with a 4-bolt.
Not sure if the 4BD1 may have the same issue.
'95 110 300TDI, F&R ARB Lockers, Twine Shower, Aux Sill Tank, Snorkel, Cargo barrier, 9 seats, swingaway wheel carrier, MadMan EMS2
'85 110 Isuzu NA 4BE1 3.6l Diesel, 0.996 LT-95, Rear Maxi (SOLD)
'76 SIII 109" Nissan ED33 5-SP Nissan GBox (SOLD)
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