I think that I can finally donate to the community with my knowledge about emissions and especially Lean burn and later Spark control. Lean burn was first launched in 1976 in Cordobas, then, later adopted into most of Chrysler Corp passenger cars. They changed the name from Lean burn to Spark control in 1978, I don´t know why.
Single pick-up distributors are used in all other cars, only 360 engines and Californian Slants and 318s got separate run and start pickups. These also used Combustion computer rather than Spark Control computers or Lean burn computers as they´re labeled on top of the computer.
The computers themselves, were analog prior to 1980, when they started to digitalize the computing system for more reliable sensor reading and computing process. This digital system also enabled the use of O2 sensors with feedback carbs.
I hope I solved some guestions!