New Backdraft starter advice

[ppbmac]

Trying initial startup on my new Backdraft 427 Cobra and having starter issues. Everything appears hooked up correct, but essentially get one or two clicks out of the starter. Used a voltage tester and 12.8 volts at the battery terminals and 12.8 volts at the power and ground terminals on the starter. Ignition terminal wire shows 12.8 volts, but drops to .3 when trying to start, which I am told is normal. I am getting the same drop in voltage at the starter positive and negative terminals when trying to start. Is that normal? I'm not the world's greatest wrench, so any suggestions would be appreciated.