Picked up my 408 from Shady Dell Friday and was reminded that I have no fuel pump eccentric. So I need to design and install an electric fuel pump system. A look on line pretty much so confused me with all the choices. The motor made 498 HP and 520 TQ. The car is a 66 dart that sees quite a few street miles and the track as well. Luckily I have a 3/8 sending unit and 3/8 stainless steel factory style line from the sending unit forward. I want the system to be trouble free and as un obtrusive to the look of the car as possible (think sleeper)But, if it means doing it "right" I can live with the look. I really want to avoid the line coming to the passenger side fender well with a regulator and 2 3 foot braided steel lines looping around to the carb. I am sure it works awesome but not the look I am after. My questions are:

Can I use the 3/8 sending unit as my pick up and avoid welding in a sump?

I read the install instructions for several pumps and it says to mount it lower than the tank. Yet tons of pictures I see on line clearly show the pump above the tank. I have seen a lot of pics where there is a factory tank with a rear sump welded in and the pump mounted on the rear frame rail above the sump ? What is possible here ?

Do I need a return line from the regulator. I see Holley makes a black pump that makes less noise and will run cooler. Does it work well ? Or is it hype ? I don't want to have any issues with vapor lock.

Ideally I would like to use the factory pick up in the sending unit. Run the Holley Black pump. No return line, plumb the regulator in right by the carb as part of it's inlet. Am I crazy ?