Anyone serious about doing an FI setup should look at this:

AEM UEGO Controler

It will control 2 wide band o2 sensors and it has a secondary output that emulates a narrow band sensor. So you can replace the 2 pre-cat o2 sensors with wide band units and see your real AFR and then at the same time have the UEGO send the narrow band signal to the ECU to prevent any trouble codes.

To correspond with this you would need either an ECU (or piggy back) that used wideband o2 voltages (0-5v) or you can simply use a wideband guage like this one:

UEGO Guage

If I ever got the freetime to do a boost app on this car I would use the AEM UEGO along with the Greddy E-Manage Ultimate.... The E-Manage will actually use an AFR target map when combined with a wideband o2 sensor to automatically keep your AFR's at whatever you want (12:1, 12.1:1, 13:1, etc etc).

Greddy E-Manage Ultimate

However I would still be worried about the Bosch ECU fighting the Greddy ECU and causing all kinds of problems. But we will never know until someone tries right!!

EDITED INFO FOLLOWS

I just found this:

AEM FIC

It was designed as a piggyback fuel and ignition controler for vehicles with a CAN-BUS system (like our cars). I have used the items I listed above with great results but have never played with this. It looks really interesting. I have also used AEM's full blown standalone EMS with GREAT results, so if this has any relation to that device it might be worth looking into.