New rear diff-- help!!

[browner1986]

Hi all, been given an impreza (you think this would be a good thing, it is but she needs alot of work) I need a new rear differential and was wondering about the ratios. Does it really matter that much? Can i do a conversion and would I have to change the front?

If anyone knows the ratio on my model that would a great help! It's a 98 impreza r sport 2.0l (non turbo)

Any help would be appreciated.

Cheers guys