i have an aluminum case powerglide with a vacuum modulator on it. the kickdown cable is missing. is it necessary in a light car? under 2000 lbs? lets say i'm getting fancy and running a million carbs and don't want to spoil the looks on top with a kickdown linkage or cable, anybody here hook it up to the pedal? didn't one year chevelle come that way? anybody have any photos to share of all this ingenuity?