3B, Bill,
0-30 Ohms seems far off from what I've read so far. The DR134A and the NAPA TS6469 are advertised for 1958-19xx Chevy truck (not 56). Since the '56 was a 1 year only send unit, it might work relatively OK, but I can't compare the Ohms. Thanks for the tips anyway.
Still looking for that 1 person who knows the Ohms.... :-)
Peter.