I've wired in my gauge cluster. I have have a reading on voltage, oil pressure gauge (I installed a mechanical oil pressure line, requiring an adaptor to go from 1/8th NPT to 1/8th BSP), and temperature sensor. I have a tach that I need to wire in as well, and then I really want to wire in an O2 sensor so I can tune my carburetor (and eventually fit in an EFI system). Good times.