Lean burn to old style ign swap?

Why the gm module? Also, not sure what i'm getting myself into as far as using plugs that mine doesn't have (ex the connector for the mopar module if i was to go that route), and what sensors that the current brainbox uses that would be used/discarded. Never messed with this stuff so any basic tips and such are greatly appreciated

There is only one thing the Mopar box does, and that is tell the coil to fire when the distributor says so.
(The same thing the GM module does but it's only 1.5 x 2.5" and needs about 15 feet less wiring and no ballast resistor)