hey guys

ive got a 2 litre v6 vitara. I put 30 "tyres on it and the performce decreased substantially but more importantly the fuel consumption got WAY worse, more than i thought it would, so im thinking about changing the diff gears to bring the gearing back to stock (or close to) Ive got a crown wheel and pinion from a 2000ish manual gv (that i got the steel house from for my diff) can i use it in the front, and get something to match at the back? or do i need 1.6 manual vitara diffs, are they good for 30" tyres or will they make it lower than stock?
thanks guys any advice will be appreciated
