I'm sort of going through the same process, though I opted not to use the Eldo calipers. If you look at the TSM web site on Dics conversion for the D44, you can get an idea of how they shape their caliper brackets. They also show two eldo calipers. One uses a thicker rotor, I think a 1.25 or a 1 1/8" the other uses a 1" rotor.
Small GM Rear Calipers
A flat steel caliper bracket may require spacers to align the caliper to the rotor. It depends on whether you can mount to outboard side of the axle flange or the inboard side and the rotor you use. You might be able to use either the thicker CJ7 rotor from 1977-78 (1 1/8") or the 1" 1980-86 CJ rotor. You could mock up a bracket with some 1/8" hardboard and test the configuration and alignment. The TSM "kit" uses their own rotors and caliper mounts. They're plenty proud of the parts so I''m doing mine using a frugal approach. Actual out of pocket costs were only for new brake lines. I got bonus parts when I bought a Dana 30 front w/ disc brakes for $100. The gears came out for the new front widetrack build-up and the brakes are going to the rear axle. One could say the rear disc conversion cost $0...or anywhere up to $100, depending on how I choose to split the "cost" between brakes and gear projects. I'm also putting in all new bearings, axle seals, a complete diff rebuild kit and the Warn internal spline hub conversion. In the end, the cost really isn't cheap at all.
The caliper mounts are GM 1/2 ton truck (1973+ ish), calipers are the '77-78 CJ rotors. Everything lines up great without having to reenginbeer anything. Assembly is in progress with parts still being coated/painted, etc. As for e-brakes, I'm going to use a push/pull mechanical hydraulic "line lock". No cable system. I may opt to install the line lock on the front lines too, as a backup. Less than $100 for 2 of them.
Dana 44 disc brakes with caddy calipers??? 
Linear Mode
