Here is a good usable differential housing that came off my 1954 dodge truck 1/2 ton B-1 series.

 no cracks.  measures end to end of housing 57 1/2''

 bolt pattern for brake backing plate 5 on 3 1/2'' on center   this is for a 10'' drop in pumpkin/stump 11 bolt  all threads chased out. has deep rust pitting under saddles see pictures can be ground down & weld fill no through rust. price is for housing only as seen in pictures. this may fit other year models. make sure it works for your truck, all sales final!  thank you!