Looking really good, Marc! That thing is pretty solid underneath for the cowl being so rusty. Ford wasn't real good about getting primer or paint into that cowl area though. A pretty dumb build process on their part.
The rear is the same type housing I bought from Currie years ago for my Mach. I have never had one single issue with mine since the car was originally done. The only disc option they had back then was the Explorer type, but I opted for the Torino bearing ends with the large station wagon/truck type drums. What type is that on your rear?