I bought an 11 in clutch kit for my 03 GT before I removed my old one and found there was a 10.5 inch kit in mine. So I am guessing someone installed a different flywheel and clutch at some point in time. It looks like the 10.5 clutch kits go up to an 01 GT, is the trans in the 01 and 03 the same. I was looking at this kit and wanted to make sure it would work? Should I get a 1 1/8 or 1 1/16 spline?