I did this swap last year in my 67 Barracuda.. 94-95 models are the easiest to swap sinc you only need to connect the engine to the computer, it's a stand alone system.
Running a 904, you don't need the vehicule speed sensor as the governor will do the job..or anything hooked to the trans... 4 wires to connect and you're ready to go !
The only hassle is tp mount the electric pump in the tank....use the stock unit.