That is good to have. I have a copy of it somewhere. The issue is, if you find an original 28 spline Trak-loc for sale, it's a crap shoot whether it's the newer style with beveled gears, or the older style without. They both have the same part #, IIRC it's M4204-F288.
I bought two off E-bay over a 6 month period, and ended up selling the one for the solid axle to a guy with a Crown Vic.
Al