The Tanks Inc injection tanks are set up for an in-tank pump and return built in. They are also vented and come with the vent check valve that can be mounted where you want. The tanks are also baffled and kind of have a sump area for the pump. I remember reading somewhere not to vent the fuel injection through the gas cap, it wont work. Also, on a fuel sender with return built in, the return is only 1/4 inch, which is not big enough, according to Fi Tech or Holley Sniper. If your going to buy the command center and modify to work you might as well buy the Tanks Inc setup and forget the command center. Think mine ran $422.00 total.
If you do use the command center and don't modify it then all you need is a vent, not a return line, and that is very easy to add.
