where does the neutral safety switch plug into the transmission a 70 ss350, and when converting from points to HEI, are both wires(yellow and white/yellow) connected to the bat terminal, or just one of the two? Where does the junction block attach under the hood, and ...will my water temp guage work without the sending unit being sent to the tcs? Thanks, Brad

The neutral safety switch wires should go to your shifter.I can't answer the rest,I have never done the points conversion.
I can say that I've only ever saw one red wire connected to the bat+ treminal on the dist. though.Are you using an after market box?

On my 70SS, the neutral safety switch is mounted high on the clutch pedal toward the engine. It is a white switch with what looks like a couple of purple wires on it. It doesn't really care if the tranny is in neutral, you just have to keep the clutch depressed to start the car.

Thanks for the help guys! Later, Brad