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.
im putting 3" straight flow piping with 3"exhaust, i felt so noisy so decide to fix up my exhaust silencer...the silencer inlet comes around 2.2inch only at the back end there..so will it be harmful towards my engine...