[VetteVet]

For the #1 pin on the gauge cluster, could I leave this attached at the bat post on the alternator, and run a new wire for the #2 pin on the alternator plug over to the junction block as you suggested? I don’t have a problem either way, whatever you think would work better.

Yes you can try that and if the battery gauge doesn't work you can move it to the junction block and try that.

14.5 is good if it doesn't go higher than that at 2K rpm. turn on a few things like lights and heater and see what happens. It shouldn't drop below 13.7volts