Increase in tyre size

Remembering of courser that you only get a "Half lift" because a 21mm increase in diameter will only lift you 10.5mm Is it worth it and are they legal in your state.

Check speedo difference herehttp://www.rimsntires.com/specspro.jsp

Standard tyres for a 76 series wagon are exfactory, 265/70/16, most would replace with 265/75/16, have you already changed to 17' rims ?

Do you have enough clearance for the size increase at the bottom the front guard when going on full lock?

This could get interesting seeing as how most 4x4 type vehicles quote a ground clearance under the diff centers. This being usually the lowest point. Measuring under a point anywhere other than that could vary greatly depending on how much load is on board at the time. Even under the diffs could vary with tyre pressures.
So taking all that under consideration I would think that the easiest way for the cops to check you out would be by standard tyre size compared to what you may have on at the time of inspection.
Sure some of the lifts you see wandering around are so obviously not standard but a lift of say 50 mm with new or worn tyres could vary maybe either side of legal/illegal.

Cheers
Pop

285/70R17 tyres (33s) will fit on a 100 series IFS wagon without any lift.
Check on lcool for more info but basically there's no drama. I've been running that same size with no lift.
It does change the gearing a bit, makes the speedo very slightly out and affects fuel economy a bit. The V8 might deal with that a bit better than a stock TD.

My travelling mate has 285/70R17 on his 200 seriees and are fine. He finds the speedo is now very accurate so watch your speed and the tyres fit the guards with a rub likely only in extreme cornering on uneven ground.

I intend to go this way also with my next set of tyres

Alan