Here is something that some of you might like to play with and still use the stock distributor. It uses the stock points to trigger a GM 4 pin HEI module.
Points triggered HEI The original condensor is removed or at least the wire taken loose and tucked out of the way. A stock coil with ballast resistor can be used or an aftermarket coil that is designed to be used without a resistor. Some of those do not have one side of the primary and the secondary coils tied together like the stock point type coil does. That is what the optional ground is for on the side of the coil drawing
This setup still uses the points, but because there is very little current flowing through them, they should last forever. The point dwell angle is not an issue with this setup.
I found this on another forum and with a few changes, wired it up on the bench as you see it. Spinning the dist by hand, had a single plug snapping away.
Another guy on the forum also wired one up on the bench and made the observation that the coil fires when the points close, rather than when they open. This may alter the rotor phasing a little, so it is something that would have to be checked. His plan is to try it on a Fnord Flathead.
Here is a very interesting web page that shows wiring up the HEI module to stock inexpensive late Chevy Crankshaft position sensors for the trigger. The main reason I included this is because it shows the same wiring for the ballast and stock coil. It's very near the bottom.
Crank Trigger HEI The page is actually for small engines and tractors, but don't let that stop you from looking at it. Toward the bottom they talk about using Chrysler and fnord electronic ignition modules. The problem with this crank trigger is that there is no mechanical or vacuum advance, but it would be a good start for a fuel injection setup.
