EEC tank vs non EEC/ 71 Dart

Can we just get rid of the eec tank (70,71) for the 72 non eec? EEC seems over complex. My tank is rusted out. Bought the new eec tank already. Going to install a electric fuel pump with a return line. Was going to hook up the the four lines from tank to the vapor tube thing. Block off the vapor return line to the tube thing in trunk(carbon filter?) The 5th line to the vapor tube thing is the vapor return line in the eec sytem it appears. Than just run a vapor return from a bipass regulator to the tank through the 3/8 return line in the fuel sender unit. 72 up fuel sender unit has a return line in it. Slick or what have I got wrong here? Tank gets it vapor needs met and fuel system gets its return line to the tank in a electric fuel pump set up.
Must be some good posts already on the EEC system to point me to. And yes, I am on steep learning curve. I am used to that. My engine builder, Gromm Racing of San Jose, has said give the new 408 stroker lots of fuel. 3/8 stainless for the corrosive fuel we have now is good. 140gph minimum he says. Looks like bust out the bucks again. Doing mopars all my life, so they are always familiar. Expensive, but way fun.