Tyre size for SWB Patrol

2 in body or suspension lift?

If its a suspension lift, 33's will go no problems, but still on MAX compression you will get some scrubbing... All brands of suspension react differently, some scrub some dont.

35's require cutting the guards. And also recommend changin diff ratios, as it is very noticeable the change in gearing with 35's...

If will affect your speedo 6% If I remember, but you can buy the gears for your speedo to change it, you change them on the side of the gearbox. 10 min job.

You do not state which Patrol. G60 or MQ-MK or GQ. If you want taller wheels and no interference with panels etc, have a look at 255/85x16 mud terrain or allterrain. These are 33 inch tall, go on a 16x7 rim and will out-perform a 33x12.5x15 any day of the week, and without the need for flares, popped guards etc,etc.
Standard tyres sizes varied according to which engine was in the truck (and as above, which model)

Diff ratio at the top of each section,

The next line is the Tyre size and the corrosponding Speedo gear for GQ, not sure about GU

3.9 diffs
31 16
33 15
35 14
37 13

4.1 diffs
31 17
33 16
35 15
37 14

4.375 diffs
31 18
33 17
35 16
37 15

4.625 diffs
31 19
33 18
35 17
37 16