I don't think you'd need the stock kegger to run the rest of the factory EFI setup...? Knowing now that the system is tuneable with HPTuners I'm much more inclined to go that route as opposed to aftermarket. I've gained some experience modifying the tune on my blown Buick 3800 V6 and wouldn't be afraid to use HPT for tuning the Mopar system. Before that the only tuning I did was with carbs, I'm not much of a computer guy either.
Shoot now my brain gears are turning, maybe I'll do that to the 360 in my D200 along with a 46RE.