If you are using 12v gauges on a 12v truck, you don't need the CVR.

 

Ok thanks, I called quick wire and this is the first time I did not get a helpful response, I asked about the CVR ( this was before I had read your post ) and he said he and they dont deal much with Fords and this was the first time he had heard of having to use such a thing.
I asked him if it mattered which of the prongs on the rear of the gauge I would attach the sensor lead too and which would receive the power, he stated that it did matter but he couldnt tell me which was which.
Not very helpful

 

Does your instrument cluster have a printed (flex?) circuit that the gauges connect to? If so, the vehicle wiring connects at a connector and not at the gauges themselves. This would (obviously) be more modern than '48-56 stuff. That would explain why we're not spouting helpful advice (or perhaps better said "opinions"). You might ask at the next forum up or so.

I think you said 1970? If so, try here:
https://www.ford-trucks.com/forums/forumdisplay.php?f=39

Edit - I re-read the thread and I think that I may understand a bit better.
As for the gauge that doesn't act the same as the others, it would be the current-sensing charge indicator. It has no electrical connections and simply senses current in the wire that passes through a metal loop on its back. If it reads backwards, run the charge wire through the loop the other way. That simple.
As for the other gauges, if you are not using the printed circuit then I would suggest that you copy it in wiring. That means figuring out what it connected to what and making that same circuit happen by using wires.
When it comes time to test it, look for gauges pegging hard and shut off power if they do until you figure out why.
Good luck with it. Where are you located? This stuff is old hat for some of us and is easier to do/teach in person than over wire.

 

Thanks for the reply, I am in Brandon FL which is just outside of Tampa, between Tampa and Plant City if that makes sense