Ive recently purchased a 99 cobra. When I bought the car I was told that it had an 03-04 irs. Short of pulling an axle and doing a spline count is there any way to verify that it is in fact a 03-04? Im doing a solid axle swap in the car but I'd like to know the value of this rear. It has poly bushings, rear brace, and adjustable toe links and sway bar ends. Thanks for your help