65 Cuda Gas Tank Vapor return line

I agree with all above. The after-market sender you have is better, so keep it. For now, just add a short section of "hose w/ bolt" to plug the 1/4" tube off, or I think you can get a rubber cap to clamp over it. Down the road, you may want to run a tube from a fuel filter vent to that port (read posts here). I use that in my 65 for a return for my EFI pump.