The factory emergency brake assembly should work, unless you have disc brakes in the rear...then you will have to adapt something between the end of the first cable, where the adjuster is, and the rear.
Yes, the Muncie, Toploader, and A833 were the thing to have for strength. The Super T10 is also good. Each type of transmission gets stronger as the numerical ratio of first gear gets lower, for example, a 2.43:1 Super T10 is stronger than a 3:45 Super T10.