hi, ive got a 1990 90 with a 2.8 isuzu engine fitted, LT77 gearbox and im told its got a rangey transfer box, it pulls like a train but the only problem is that she'll only do about 55 fairly flat out, i can get it upto about 65 downhill but thats starting to push it, so my question is that could anyone tell me what i could do to make her go a bit faster, possibly a different transfer box or different diffs ? any help would be much appreciated, cheers, mat.