Installing a GM HEI Module

The GM 4 pin module is MUCH easier to wire up & will do everything you want. See post #27 for the diagram. You can buy new modules for $15, so for $30 you can buy two, & piggy back one as an in-situ spare.
If a canister coil is going to be used, it will need to keep the bal res, unless the coil maker states otherwise. If using an E core coil [ good idea, more spark energy ] such as MSD #8207 or Summit # SUM-850500, you do not need the bal rel.

One of the pick up wires on the Chrys elec dist will be black. It connects to the 'G' terminal of the module.
Not easier. The 8-pin has a GM cable that runs from module to GM coil so just plug and play for that connection, and designed to work together. The connectors are weather-proof Metri-pak, much better than the exposed spade terminals (type 57?) of the older 4-pin module. The megasquirt site has info on many different ignitions to retrofit.