Has anyone tried to adapt a Getrag 2wd mainshaft or a nv 4500 Dodge Cummins 2wd mainshaft to a np 203? I'm not sure if it will work, but the Dodge 2wd shaft is listed as a 31 spline, which is the same as ford input shafts, but are they the same diameter? I don't have these parts in front of me to test, has anyone else tried this. I'm also thinking the mainshaft could be resplined and shortened to couple to the Ford np 203. I'm trying to do a doubler with a Cummins, and would like to use a Dodge fully splined mainshaft. Thanks in advance.