I used the kickdown cable with a Carter Carb and had to modifiy the carb to hook to the cable. If you have the Holley no mods are needed. I also bought the bracket that holds the cable. It would have been cheaper for me to make it.

Cable works great though and is easy to adjust.

I'm using the factory throttle cable. Car is a 68 Charger with a small block and edelbrock performer intake.