Allstar Performance ALL54224 Throttle Cable Bracket

Are any of you guys using this bracket?
My setup is a 70 Duster, 408 with an Air Gap intake, 1/2" spacer, Quick Fuel Q-750. I have been using an AR Engineering tall throttle bracket with one of those cheap Jegs dual spring return that mounts to the carb. Pretty much the same as I run on my B-body big block cars. My complaint with the Duster is a heavier throttle than my other cars. With the cable unhooked, both it and the carb work nice and smooth.
So I bought this Allstar part to try. What length and brand of cable are you using with this bracket?

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