shift lights are universal, you can tap your tacho signal from either the ECU (EFi) or negative ignition terminal (distributor). Of course the ECU is normally cleaner.
I'm running on a carb myself and if you can run a tacho, you can run this.
If given the choice, which would you prefer the most: a carefully-engineered piece of automotive marvel like the Bugatti Veyron, or the bad boy supercar like the Lamborghini Gallardo? Of course one of the advantages...