fat-lip-resto raises a good point with his question above:
so how much sheet metal can a guy replace before it is illegal, you can buy frame rails, full pans, full qtrs, aprons, rad support, ect..
We all know of cars out there that have been pulled from the junkyards or barns and had more rust than anything else. Outfits like AMD, goodmark, dynacorn are doing great work at making parts to help us get these cars back on the road. However, if you replace frame rails, floors, fenders, quarters, & roof, then how is that still the car you set out to restore? You would be basically building a car around the VIN tag. How is that different than re-tagging to a good factory body?
Now, let me just clarify my personal position on it. I'm huge fan of having as many musclecars built & in use as possible. I like factory original cars, I like resto mods, I like pro street, and I like street rods. Different people like different things and there are many ways to participate in the old car hobby. So I'm very OK with cloned cars and building what you want, but I believe that it should be
disclosed as a clone and
never represented to be an original. I'm a huge admirer of those that can take a car where there's not much left and bring it back "from the dead". And the companies that are providing us with the materials (sheet metal, trim parts, hardware, etc) to do this are fantastic supporters of our hobby.
I think that this is a good discussion to have.
(I do understand that regardless of this discussion and anyone's views, there is always the stated law that makes it illegal to move a VIN, as PettyBlue72 correctly says)