I wasn't sure, so I was asking the question for my education as well. Do you have to shorten the shaft since the pinion support is a bit longer on the D44??
1973 Bronco, 351 SEFI, Locked, discs, 35's ZF-5spd and Atlas 4spd. 235:1 Crawl Ratio. It may be ugly, but it's slow. http://www.ucora.org