Lean-Burn Dual P/U Distributors - Any Good?
The megasquirt site has much info on spark controls. I think the late 70's - 80's Mopar distributor had no centrifugal or vacuum advance. That was all done in the "spark computer" or "lean burn" controller. The vacuum sensor was built onto the side of the box and looked like a vac advance pod. My 82 Aries had that, but the distributor pickup was a Hall-effect type.
The easiest computer approach is a GM 8-pin HEI module, controlled by a Holley Commander 950 controller (or similar) from an rpm, Pman map. You can add a knock sensor & module for optimal control. Steal it from the same 85-95 GM V-8 truck and screw it in as your block plug.
The "final solution" in my 65 Dart 273 will be just like goldduster318. I already mounted a 36-1 toothed wheel on my crank pulley w/ Ford VR pickup and also made a mount for a Chrysler Hall-effect pickup, both off the lower water pump bolts (posted photos several years ago). A Ford EDIS module will process the 36-1 signal. It normally drives Ford coil packs in a "wasted spark" system, but any two 4-cyl coil packs would also work. But I plan to do like above and use the cam sensor in a Magnum distributor w/ custom logic circuit to select just the needed spark for each cylinder and drive GM truck LS coils. I have all the parts but no time, but then I'm not even driving that car yet.