Adaptor plate to mate to chassis/steerbox is required for the vitara box, or redrill and tube the chassis mounts....
The vitara pas is pretty weak anyways, so why bother?????
I run a carlton pas box mounted via an adaptor plate to the chassis leg.
Slightly modified pitman arm, and a vauxhall pas pump.
vauxhall pipes all fit as well.
Ive got 275/65-16 Anacondas, and Itll turn them with no effort at 12 psi on tarmac.
Ive heard rumour that a Jimny box does go straight on, but Ive not seen it done. Believe me tho, a Sammy with bigger tyres and PAS is so easy to drive off road.