Magnum swap-what all mods can you make still using factory efi

I've never seen a comprehensive "do it" website or anything else on reprogramming Mopar ECU's. It's always "send off" to him or her and they can reflash it. Ma seems to be the worst, as far as getting into, hacking, reprogramming their ECU

Frankly, I'd learn how to............. Megasquirt, go over to Binder Planet and learn how to adapt a GM ECU, or put a Holley or other ECU into your hardware. It will take some work. When you are done, you won't have to worry about engine mods, because then you can program the thing.