I am hoping to avoid a visible ballast resistor in favor of an almost invisible length of resistor wire, but cant seem to find it. i was just going through a Blue Streak ignition catalog from 1972 and don't even see it listed.....
Another way to make the resistor "invisible" (well almost) is to install it under the dash near the ignition switch. Probably only you will ever see it. The rest of the wire to the distributor can be standard copper wire.