Anybody wanna tell me the worst part of replacing the trunk floor in a 67 (besides everything). I've never done one and the 3 piece NPD set looks interesting. BUT, there are these options: US-made, non US, brace welded on, no brace. What's the deal? Our floor pan is rotten from tailight panel to front hump. Could use some advice. (This probably won't be the only time). THANKS!