Looks very good miguel!!! I'm doing the same for my duster...lots of oven cleaner and black epoxy paint...also doing my rear..had an axle stuck in housing was a ***** to remove!!!
i used the autozone degreaser, but unfortunately i don't have the space to do it well and i gave up. What differential is? my duster came with DANA 30 (i think). Try to use WD40 for stuck parts.
(sorry if my english is not good, i'm trying to practice using google translate as little as possible)