1968 Barracuda with internal gauge régulator

The regulator you have chosen appears to be the thermal type used on non rally dashes. Will it work, maybe? Is it what you want, likely not. Remember the factory regulator is located in the fuel gauge on rally dashes. You have to deal with it first then use an alternate method to supply the 5v to all. I used replacement gauges and a electronic type regulator. Very pleased now!
SO DID I, IT`S STILL SCREWY !