I have a solid axle in my 01 and I have my IRS just laying around in my garage. My question is since my 01 has 31 splines, that means my differential must be for 31 splines. Is it as strong as the 31 spline differental that ford sells that was put in the 03 read ends or would I be wasting my time taking it out and putting it in my soled with a set of 31 spline axles?