rear disc from grand cherokee on a 8 3/4

ramenth said
To answer your questions I don't believe there to be a true "bolt on" rear disk assembly for the 8 3/4. Not in the perspective of just bolting on and go with just a few, no hassle mods. Not in the sense I believe you're looking for from the tone of the first post quoted above.

A friend used the rear disc set-up on his 64 and 68 Darts as shown in this link http://www.tsmmfg.com/2160.htm The kit uses 79-85 Eldorado/Seville calipers which they can provide or you provide. Apparently those calipers came with and without a parking brake.