I went with the Lokar throttle cable, and kickdown cable on my Magnum swap. Just dont know if you're going to find any "stock" type parts that will work, both because of the magnums intake bolt being straight down instead of angled like an LA engine, and because the airgap makes the carb sit so high.

p.s. My car is an A-body, so you might need different cables for your B, not sure.