Slant revival

If you can find an electronic distributor, then an HEI module is cheap and easy (many posts). Otherwise, Pertronix is simplest. As mentioned, the original Ignitor is $70 on ebay and uses your existing coil and ballast resistor (required). The Ignitor II is ~$110 and closer to HEI. You can lose the ballast and you can run a better coil. Ignitor III is even better w/ MSD. To bypass the ballast, look for a male-male spade terminal and just clip both connectors together where the ballast was.