Well you could always get gauge overlays, but you need working factory gauges to make stuff like that work. Or I guess you could go with complete aftermarket gauges like Autometer, AutoGage, or Sun gauges.
If you wanted a really cool look, you could add an A´PEXi Rev/Speed Meter to act as your speedo and tach....but the speedo would be km/h
If you wanted a really cool look, you could add an A´PEXi Rev/Speed Meter to act as your speedo and tach....but the speedo would be km/h