) 1956GH Packard eng)- use it's own distributor mounted special sender. Will not work on other Studebakers

2) 1951-1958 Delco 1110839, and 1110864 V8 Distributors can all use the '55-'61 Sending unit IF 
you use the '55-'61 Speedster/Hawk-style tachometer.

3)1962-64 Hawk w/1110864 or Prestolite uses a square sender with GT-style tachometer. This setup 
can be used on all 1110839/1110864 distributors IF the regular GT Tachometer is used.

4)'63-64 with Prestolite Distributor- uses a round can-style sender for R-series Tachometers

5)'63-64 with Prestolite Distributor- uses a square-style sender for standard Tachometers


Studeman - 	Ray Fichthorn -  	Winston Salem, NC  SDC Forum #26619