planning out dual tank fuel system for LS swap

[heavy71chevy]

So im plannin out my fuel system for my 81 c10 6.0 swap.Im tying to retain my factory dual tanks and keep the price low.My plan is to plumb an electric fuel pump into the supply line right after the selector valve to feed a corvette fuel filter/regulator.Would it do any harm to just cap my return line alltogether?this is more then likely just a setup to get it rolling again and im not looking for perfect just funtional.My stock tanks are oem so theres no baffles for intank pumps so thats limiting my options.Ive been looking at alot of different inline pumps and mainly focused on the 255 pump because my setup is bone stock so 350 is right at my target area which wont take much to feed.Thanks any advice/Input much appreciated