Ford Generator/Alt Conversion Kit 6 to 12V 2000 3000 4000 5000 7000 Tach Drive. Brand New Aftermarket Ford Tractor Alternator Conversion Kit. This Kit will convert a 6 Volts Starter style electrical system from 6 V to 12 v. This Fits the Following Models. Ford Tractor : 2000 3000 4000 5000 7000. Alternator kit for Ford Tractors with tach drive mounted on the back of the alternator. Includes Alternator, Mounting hardware and wiring harness.