Im trying to get a better road ratio for my Mira. Im running the ED10 847cc engine, coupled to a 4wd box that ran the EB (i think) 550cc engine and the top end ratios and very bad for highway use. I understand the ED10 box in 2wd was a lower reving ratio than the smaller engine coupled gear boxes.

Did the 4wd gear box fitted with the ED10 have the same highway friendly ratio?
By fitting the ED10 box, will that automaticly change my tailshaft speed to match the rear diff?
And lastly, are there any for sale anywhere?

Kingsley