from all that I have read concerning lokar and bouchillion cable/kickdown problems just me I would highly suggest locating some OE stuff. I would think alot of of that stuff spans alot of years.
i have removed 12 or so lokar setups and replaced them all with factory pieces. the reasons this was done ranged from cheap, easily bent with use, bracketry to incorrect transmission adjustment ratio problems. at times, the factory replacement pieces required modifications because of intake manifold choices, but this inconvenience was way outweighed by correct transmission operation, as well as factory correct appearance, over the lokar stuff. i believe the main reason for the lokar problems lie in the design of the components, as these appear to be a GM design, modified [poorly, in my opinion] to fit the mopar application without thought to the proper carb to trans lever ratio. with that said, there are some that say the lokar setup works. that may be fine for them, but just because something "works", doesn't mean it "works correctly". i don't like the lokar setup, and strongly recommend staying away from it, using instead, a factory linkage [modified if necessary] or a manual valve body [as has been mentioned].