‘66 Barracuda Fuel Gauge Pegged!

I had a similar issue with 66 Barracuda Fuel gauge - the ivr is in the fuel gauge for that cluster- I will post my pictures.
I removed it and went externally with the RT engineering solid state and some wiring- fixed it. Gauges work faster as well- no warm up time is best way to describe the issue. Keep us posted on your findings. A few posts about this situation on here using search feature.