I have thought about how to add a second alternator for the house battery setup to a computer controlled Dodge engine and found this:
http://www.alternatorparts.com/external ... r-kit.html
It allows you to run an alternator without wiring it through the computer. It would be just the ticket in this eBay setup.
I'm sure one of our esteemed Ford gurus could comment on whether or not the wires at the back of a Ford alternator could be hooked up to this Dodge setup.
Otherwise I'm sure this website could help find a Ford version: