well, I'm not sure about bases, but with a 12V system you need either an external ignition resistor or an internally resisted coil, not both - 53 [6V] didn't originally have the resistor so it might be mounted anywhere, later originals were mounted on the firewall .... with the key on you should have power at the resistor, but there will be power at/from the starter to the coil only when the starter is engaged, which allows the coil to get full 12V and produce a fatter spark when cranking
so is there a problem with starting? does your externally resisted coil seem to be causing trouble?
Bill
