rear disc from grand cherokee on a 8 3/4

We didn't use the e brake hardware on our swap but I can't see why it wouldn't work if you could figure out how to hook the e brake cable up to them.
We didn't have to weld anything on the housing the caliper hoses hooked right into the existing brake lines. We did have to bend the lines some to make it work though.

It looks like that is a sliding caliper so if you hooked up the hard line for the brakes then everytime you apply the brakes you will be flexing the steel line when the caliper moves. Not a lot but how many flexes can the line take before it breaks? Might want to look into short flex lines. Just a thought.

Larry