hey im bit complicated....now im using 1.5i saga standard engine..then i want to change the engine to use 1.5 dohc mitsubishi is it right the we need to change the dash board because some of my fren said carburetor engine n injection cant use the same speedo meter.....is it we can still use the saga dashboard.....after all i cahnge the injection engine....want thing is it using injection better consumtion than carburetor?