I think I have it figured out now. Since I already have in-tank pumps, I will jump switch out pumps to an AC Delco EP 241 or possible the Walbro 255. Although since Walbro sold the pump unit I have been reading a lot of bad news about their product since then. And they have a "low price in lieu of warranty" policy now.
I've ordered the above switch valve, and figured out what type of hose and clamps to use.
Not nearly as difficult as I thought. This should be a lot easier too since I will be using a returnless system on the engine.
Thanks for all the replies!