Question: Getting the most out of a stock looking ignition system.

His 1968 is a points car, so the "Mopar ECU to HEI module" conversion isn't an option. An "under distributor cap" type is the only option I know to keep the original look. Besides Pertronix, I recall a few others (Accel, some in J.C. Whitney catalog long ago). The Ignitor III is best, since multi-spark. The Ignitor II is also good. Avoid the original Ignitor since an older design that requires using your ballast resistor, i.e. equivalent to the old Mopar ECU.

Pertronics has a points to electronic conversion kit for the points distributors, so the OP could just use that with a standard coil and get away from points and still look stock.

For HEI he coud use the Pertronics conversion and then use an e-coil instead of the canister type but loose the totally stock look.

Hey Del,
I was one of the people that used the Mopar box with a 4 pin HEI module.
Here's one of mine, and the only visual difference is the length of the screws since they didn't hold the diod innards any longer.