Solid rear axle out of 03 GT w/ 3.73 gears

[2001SilvrGT]

I have a SRA currently swapped into my 99 cobra from previous owner. I dont know what exactly done to the rear but I do know it has 3.73 gears in it an it was out of a 03 GT will also include exhaust and coil overs which it has i dont know how many miles were on it before it was installed im looking to bring the car back to stockish and im looking to trade my SRA for a IRS plus cash on my end perfer a 03-04 cobra irs setup but 99/01 cobra is fine can text me at 6316267477 I'm located on Long Island NY