I still haven't had the chance to do my swap. But my TH350 came with the kickdown cable. I bought a universal throttle/kickdown bracket from parts store. Made by Spectre part # 2428.
Says: universal throttle cable bracket with A/T kickdown cable bracket fits all 2bbl and 4bbl carburetors
Like I said, it should work fine, but I haven't done it yet. Let us know if you get it done before me. Or if I get aorund to it, I post back