I am using an external gauge on my '38. I bought a universal sender '30 amp' from Chevs of the 40's and then a gauge from Auto Meter also a '30 amp'. I wired them up and tested before installing into the tank.
They work well.
Wayne 1938 1-Ton Farm Truck Stovebolt Gallery Forums 1989 Silverado 1996 Mustang GT convertible When I die, I hope she doesn't sell everything for what I told her I paid for it!