I have the super six intake and exhaust to go on my 63 valiant, I was wodering if the changeover was worth the extra work and time for the performance?

Yes I think you would like the diff!! We did Don

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You will get better mileage usually, and can take it on up to about 4500 rpm without the feeling you are ringing the poor things neck the way you do with the one barrel at that RPM. You will have to work out the kick down by mating the bottom of your old one to the top of the super six one. Cut them both, and splice them together with a threaded union. You will need a die to put threads on both parts, and lock nuts to keep the union from twisting apart.

Sam

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I can see this working, but...why go through the fabrication and such, when the Super-6 kickdown setup (complete) can just be dropped right into the '63? The only change that'll need to be made is to install a cable-type accelerator pedal (and, obviously, the cable) rather than the '63's original rotating-rod setup.

Or, if you want to keep the rotating-rod throttle setup and the stock kickdown, see this article:

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