getting pissed off!

you can check resistance at the back of the fuel gauge and it should be about 20 ohms. but understand even if it reads 20 doesn't mean it is good once it gets hot and moves it might short out. There are certainly other people who rebuild gauges.
You will need to disable the internal limiter. then try the external limiter worse case the gauge is fried and it wont work, best case it will work fine.

64val67gtx said

So what your saying is... The gauge burnt up, and there is no way other then the option u pasted? can u wire a 67+ silver box to it via 3 wires? why have i ran into a few pics online "64 cluster" with some chip on the back? did they inturnally rewire that as well? good info... can i just buy that unit and install without modding my gauge? thats sounding a little more promising.

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I understand the frustration and yes that can be the result. I've been there - done that. I got tired of ripping the dash out and finally fixed it once and for all. I don't think when these cars were designed they were meant to be around in 50 years. Some things just have a limited life span...

64val67gtx said

Well i guess ill get a stock gauge and Not upgrade and wait for it to go out and be back at step one. i thought this was a simple thing. no wonder im getting so angry, at this poor design.

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here are some pictures of the inside may not be exact but close. you can see the limiter before and after (disabled bent) better to gut it but....