Need A Body experts. !!

I totally get you man! I just went through that with my 70 340 swinger and the body and paint that I had done last winter. My body guy kept encouraging me to get new panels, valances etc to save time and get a perfect part , lesson learned aftermarket parts will never fit like original pieces never. Small differences and fitment problems are going to be a deal. Any real restore / paint body man will know that, but a lot of these gun men can lay paint but aren't worth two cents when it comes to Restoration. When I accepted my car after it was almost 3 months late it's paint job the paint was beautiful. But the fitment work had a lot to be desired.