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.
Need help in resolving overheating problem.Cruising without boosting ,water temp kept rising.When idling temp stay at 80 deg cel.Currently using front mount .Lastly whats should the normal water temp on a series 5 FC?