another no start question

I have no idea what you are referring to. What do you mean "original wiring group."

You talking about power for the new gauges? If so that should be OK.

What did you do about the original ammeter connections? I assume the car cranks using the key?

If you have spark during crank, it should run if it's getting fuel, if the spark is hot enough, and if the plugs are not fouled.