Hello;
I am planning to do a Mopar Performace style electronic ignition kit for my 66 440 C Body.
Get a good quality ECM from Richard Ehrenberg on E-bay.
Get the MP wiring harness from Mancini Racing or Ehrenberg or others online.
Buy a service part replacement reluctor and pickup plate from any number of sources. Install these in your existing (aluminum) distributor and keep your original advance timing (the MP units were timed for race use anyway).
Installation instructions are all over the web.
Install, and have a good fascmile of the original MP kits, all with readily serviced parts.
Am I missing anything?
Mark

PS, whish this site had spellcheck