Unfortunately the mounting holes are incompatible. In addition, the mounting holes of the knob adjustment dampeners made in the later years of Ludwig production are incompatible with those of the earlier production, having the small screw hole on the top instead of the bottom as in the earlier original tone controls. In my opinion, the original baseball bat style, when reset and properly adjusted isn't really that terrible, and you should leave it for the sake of originality and for your drum's resale value as an "authentic" Supraphonic.
It has been my experience that each and every Ludwig knob control tone control was poorly designed, so that the disc covered with black felt becomes loose from the supporting lever arm and rattles terribly both in 'on' and 'off' position. I've always had to glue the discs down to the lever arm using mixture strength epoxy glue in order to utilize them without hearing a terrible "buzzz" emanating from the drum...a minor hassle, admittedly, but still a hassle. Congratulations on being a Supraphonic player, and good luck in the future!