Need help/advice

I'm restoring a 1964 Dart with 904 push button transmission and a 225 Slant Six engine. We went with the Clifford Performance upgrades with dual outlet headers, intake manifold and a Weber 2 brl carb.

The problem I'm having is that I'm now being told that I can't use the push button transmission with this set up. Does any know if this is true? Or if there is some way to make this set up work? I'm basically being told I need to get another 904 from the post push button era and put a shifter in the car.


Any advice will help.

Thanks.