All that WWII gold....
We're in like sin! Courtesy of my technical advisor, I only tacked them in place. I measured here and there a few hundred times, stared, adjusted this and that and after many hours of fiddling my thumbs tacked it in place. Adjustments can be made accordingly when I have a tub and such on the frame.
Here are the top plates. I didn't doll them up or anything yet but that's about what they're going to look like. So I made a mistake and will pay for it in welding rods and material; The square tube was 2x3 and the spring eyes are roughly 3" wide so I am going to cut off the "wings" on the spring mount plate and try to tie the other end of the spring mount to the frame (box it in).