I did a search but couldn't find the answer I was looking for. I've got a '89 GT that I want to transplant an IRS into. I've seen several '03 IRS's on Ebay, but I thought they were a little over priced, so I put it off. Now I've found an '01 IRS that seems to be at a good price (with about 75,000 miles). My question is this, is the '03 IRS far superior to the '01 to deserve the almost $1,000 more price ? I know they both are 31 spline and the '03 half-shafts are improved in some way (?) and they come with 3:55's. Can someone tell me what exactly is different beside those things ? I will probably get rid of all the rubber bushings, add the differental cover brace and swap the 3:27's for 3:73's if I get the '01 IRS. Any info would be great !