Pretty sure youll be fine. As long as youve got live and ground wires coming from them (or if the signals ground themselves to whatever theyre mounted to). Youll need a flasher fuse as well i believe. As to the voltage I /think/ that earlier tomoses had 6v stator plates and newer models have 12v. It just depends on what year of the tomos the signals came off of. If worse comes to worse just buy new bulbs ;)