Outer Limits 4x4 Board

Hi all. I have just bought myself a 94 75 series turbo diesel landcruiser ute. So far Im liking it. Bit of a change from a 5 litre wagon. Im only new to the game of 4x4s so naturally I have a few questions..

It currently has 31 inch cooper discoverers on it and It seems to rev its tits off on the freeway. About 3 grand at 120 clicks. Is this normal? What would I expect to be getting out of it with a set of 33s on it? easy fix or not really?

Is there only one diff ratio for these trucks? 4.11111111?

My windscreen panel is rusty. Should I get it repaired or is it better to bolt in a fiberglass one? Is this a big job?

Thanks Guys.

Matt

can say on the rust! dont have that problem! As far as the revs go yes they rev hard with 31's on. i went to 285x75x16 abit taller then 33's and it droped my revs back to 2800. Yes the diff ratio is 4.1.

Hope this helps!

dont no about the rust dont have that prob to lol but yer i got 31s and it sits at about 3 grand at 120 if u put 33s on it will drop your revs but your speedo will be out mine was out 3 to 5 k but a mates is 7 to 10k out and then another mates aint out so u will have to find out wat it is