Here's a different slant on things , A bit old fashioned nowadays but when I built the MINUS, I fitted the Complete Dash Pod from a Mk 1 Metro Turbo. The wiring is the same colour code and as long as you have the two multi plugs which connect into the back of the pod you can graft together any circuits ( I cut 12 inch tails when I got mine from the scrappies.). I've got, Rev counter including the clock inside it, Speedo, corrected by the speedo drive in the G/Box, Temp, Fuel, Indicators with separate L&R, Instruments lights , Oil, Gen, Main Beam, Handbrake and Choke warning lights. ( The choke cable is from a Mk 1 Range Rover. and has a little switch which clamps round the cable and works when you pull it out and in ) I just left the Brake pad wear, and the Seatbelt lights disconnected, It wasn't an easy fit, I had to cut into the top rail and make up one off brackets, But it works and it's different. That's the beauty of a Kit Car, you can get away with virtually anything