Early A floor repair options?

rockauto, $55. + shipping. Had to massage with a rubber mallet to curve better near the tunnel. I cleaned and painted the sub-frame insides before installing the new floor. I had trouble w/ burn-thrus with my cheap wire-fed HF welder. If I do again, I'll lap-weld instead of butt. After these photos, I covered the seams w/ fiberglass matt.