OK, I made a little more progress. I got my power supply, a Corsair AX1200. I am hoping to not have the noise issues some experience. So far, in thesting, it sounds ok. I plan on re-doing ALL the cables to make them the proper length. I will need to remove the ends from the originals and rewire and sleeve since the geniuses at Corsair used proprietary connectors. Thats right, the 24 pin is split into two and the keying of the 8 Pin PCIe and power are non standard. Not a big deal, I guess. I would have preferred to leave the originals intact.
My plans are to flush panel mount the PCIe connectors directly below the video cards and use short, 3 to 4 inch, jumpers to make the connections. It should look really cool and be much cleaner. I must admit I borrowed the idea from someone elses build but can't find it again to give credit. I will update if I run across it again.
Here are the bracket(s) that will bolt underneath the sub-floor. They just need cleaned up a little and powder coated black to match the case. Now I need to cut the appropriate slots in the floor.