I have a '65 powerglide out of an Impala. It was a floorshift so the shifter rod went toward the back, and then there is kind of a Rube Goldberg linkage going up to the carb. Is the linkage to the carb just the kickdown in place of a cable, or does it actually control more of the trans function like a Buick switch-pitch linkage? Thanks. Just trying to figure out if I can replace it with a cable.