I bought a new Accel Dist and coil for my 1978 429. The plugs do not match so I need to know what the three wires from the truck go to. The distributor has a red/black/brown. The truck has three and my Hayes book tells me they go to the dist, but don't tell which is which. I also put a test light on my coil after I hooked it up and both side were hot, so I unhooked the neg side and both sides are still hot with just the positive side hooked up. Is this right?