A couple of questions:
Is the 3800 a even fire engine?
And are the firing events spaced the same as the inline?
If the answers to the above questions are YES then with some work you can get the DIS system working, however, you will need an aftermarket box to do the timing.
A easier/better way is to use the Ford EDIS system off of a Ford V6 and then use megasquirt to do the timing control. The new MegaSquirt II board is almost ready and it has built in support for the EDIS system. You don't need to do the fuel injection part if you don't want to. Megasquirt is happy running only the ignition system. Once you have it dialed in going the rest of the way is not to much work.
