Fuel Gauge not working

Good Lord, Help me...

I guess it's my turn to write an essay.

To All:

First off, it wasn't a personal affront on 67Dart, It was a Reaction. I've seen far too many crass responses and ongoing sniping on these threads over the years and it's frustrating. Same goes in all walks of life. I try to treat everyone with respect. If you look back, I finished the initial post with "Sorry if I seem a little short; This car deserved to be on the road and I'm aggravated." My apologies...

Before I get too far, THANK YOU FOR THAT THOROUGH RESPONSE, 67! I hope I am able to do something with it.

67 and 72, I realize in my haste, I dropped the ball on what my car is, Sorry. I find myself being pulled every which way lately for time and after at least a month, I finally got a minute to ask the Subject question. I'm an old single guy with with plenty on my plate, not a lot of dollars and even less time. On top of that, I've got a habit of routinely putting my projects aside to help other people (probably a big reason why I get testy when people get short or impatient with others)

67, I wasn't ignoring your question, I simply wasn't there. It may have looked like it because this site is one of about a half dozen that I keep a tap open all the time. I was pulling carpet in my bedroom along with a thousand staples to get it ready for a friend to install some new stuff. I did look back and tried to respond on my phone which can be a PITA and took responses in order starting with MURRAY's. My response to you was going to be a little longer so I decided to finish the room and address it once I could get to my CPU. By the time I got to that, you had already repeated the question...

A factory oil pressure gauge is probably the key to the rallye cluster question. Mine Does Not have one; I installed an aftermarket gauge 50 years ago. I don't know if I've ever seen a factory oil pressure gauge in this model year. Does anyone know if there was a rallye option in '72 as that was the initial year of lowering compression and "de-smogging".

Before I get too far, I should mention that I have plenty of Mechanical aptitude but electronics ARE NOT my forte to say the least. That said, how would you suggest I "devise" a way to ground the fuel sender wire and if necessary the temp sensor wire? I get really apprehensive about electricity for just the reason you state about damaging the unit. I've burnt enough wiring in my day.

Thanks in advance for any more info.