Magnum motors

So, I brought home the motor, trans and rear end yesterday. About to go unload it and take some pix :) I got the two computers along with all the connectors for each sensor/controller/whathaveyou, that was removed from the R/T wire harness with about a 3-4" pigtail. I was told the plan was to ship the pigtails off to a place that makes harnesses for your car. Anyone know if that exists? If so, any experience with them? I wanna move forward with the plan of putting the 5.2 in the Demon. Does the 5.2 use the same type of headers as an LA motor? I can get that ordered in the next couple weeks, and get the car ready to be fitted with the OD tranny while I wait for the harness to be built, and get the motor swapped into my Dakota :D

j