They will swap right into a S6T no prob. As for voltage on my 9.4 with the said ignition I tried powering up my Vapor Tech speed ohmmeter head to it for power on the night back lighting. I practically had to keep the motor at at about 2300 rpm's or it would kill my motor. So I opted to use a 9volt battery instead on it which was said to last up to four months at 1/2 watt.
The said same Vapor Tech unit actually powered up better on my china easier when I checked vy it's famous white wire. I never did measure the currant on mine. I could prolly check something if you need me to?