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The first thing I have to ask is WHY? What has happened to the original engine that you want to replace it? My second question is does your Patrol have coil springs or leaf springs?
A. Yes but it will be slow. In Australia it would also be illegal as you would not be fitting an engine that complies to the emmission regulations relevent to the build date of the vehicle. (Ute or wagon, leaf spring or coil spring, what corner of the world are you from etc - this is why we ask people to post an introduction, it helps us get to know you and your Patrol)
A.5. You would also need to modify the engine mounts, fuel system, exhaust, electrics, cooling system.
B. You can try it but I suspect it will need a custom driveshafts and will vibrate badly due the steep angles of the rear shaft.
C. If you have a leaf spring ute then maybe but the ratio needs to be LESS than 2% different to the front diff.
D. MK Patrol diff would be the closest to fitting as it's also a H233b but would only be remotely possible if you have a leaf sprung ute. MK diffs are too narrow in the track to fit to a coil sprung GQ and are not set up with brackets for coil springs, trailing arms, panhard rods etc.
"Please take into consideration that its easier for me to change the rear differential instead of changing the whole engine and transmission......... well at least for now." I don't understand, You ARE planning to change the whole engine and transmission?
Getting back to my first question, why are you thinking of putting in the SD33 and gearbox? The cost and effort involved modifying engine mounts, fuel systems, exhaust systems, cooling system, tailshafts, electrics etc just to fit a temporary engine would almost cover the cost of a TD42 and the modifications would all need to be reversed anyway?