14" Disk brakes

Aww, I thought we were talking about 14" brakes not brakes to fit 14" wheels. These are only 13"

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factory 65~72 for small bolt pattern or 73~76 for big bolt pattern will give you front disc, rear drums. there are also some aftermarket front kits that will fit a 14"

if you're looking for rear discs that will fit with a 14" rim, i'm not sure such a beast exists.

DoctorDiff's 10.7" rear disk kit works with 14" wheels, looks like he's confirmed the fit for 14" rally and magnum wheels. That's BBP of course
Mopar 10.7" Rear Disc Brake Kit
I believe Dr Diff has some that will work for the front.

10.95" Front Disc Brake Kit (Stage 1)

Yup, that kit is the same as the 73+ Mopar disks, just with reproduction parts. Also BBP.

Not entirely sure, but I'm guessing the OP is trying to keep his 14" rallye's so he probably wants a SBP kit. I know the Stage 1 kit can be made to have a 5x4" pattern, but I'm not sure it will clear original SBP 14" rallye wheels