Holy cow! I wouldn't even call the seal an issue. Get a 23 spline "medium" length shaft if you can find it. Worst case, get a long spline and cut a bit off the end of the shaft.

The seal is easy. Measure the OD of the seal, measure the OD of the t-case input shaft and that will tell you the ID of the new seal. Go to an industrial bearing supplier and give him those specs and find one the same width as the old one. If you can't measure the stuff, bring the parts in and have them measure them for you!

Worry about making new driveshafts and a new t-case shifter. <img src="/forums/images/graemlins/kewl.gif" alt="" />