Editing HICAS - Removal (section)

===PS Pump and Reservoir===
Two options here, keep your import pump and reservoir, or fit an aus spec PS pump and res.
Import pump - this is a two chamber pump, The front is for your steering rack, rear for hicas. You can remove the vanes from the rear pump by taking the rear casing off the pump. The vanes (10 little steel squares) will just drop out.Remove the rear banjo bolt, you can turn it into a plug by filling with solder, then cut a short length of 3/4" copper pipe to replace the banjo fitting, The rear chamber has a bypass valve so blocking it shouldn't cause any issues. You could also just weld up the threaded fitting on the pump to seal it.
Import reservoir - this has two return lines, plug one with a 3/8" radiator stopper or similar rubber bung.

Aus pump - to bolt to an RB20 you need the aus pump bracket. The two lower mounts bolt on but you will need to add a spacer at the top between the bracket and block, use a few M10 washers or similar. Exhaust manifold yokes work as well. The aus pump uses a 3 rib belt while the import is 4. A 3 rib belt will be fine on the 4 rib harmonic balancer. You need a belt 855 or 860 long (3PK855 etc)
Aus reservoir - bolts straight up to the strut tower.
Note: the pump supply hose is a different size between import and aus, so you need to use aus pump + res, or import pump + res, not a combination.