Well the more the better. Having the car, even if it is rotted helps when attempting to rebuild the car to correct. But if someone had the tags on the cowl with the door pilar with VIN attached I would be interested. I don't know what is legal as far as removing them, depending on where you might live. I don't want anyone to do anything that could be considered illegal or whatever in their juristdictions. I have seen them removed in restoration shops for certain work but I have never done it.
1969 Firebird 350 Coupe, Rust free Texas body, formerly brown, now a TA clone with quality spoiler, latching hood and TA wheel; 1969 GTO Convertible Expresso Brown/Parchment(currently painted red). Both numbers matching. My first love was a Cameo White 67 326 Coupe, bought back in 1983, at the age of 17, for $1,200. Been hooked since on PONTIAC! Working on a 67 400 ragtop for customization-Gulf Turquoise/Parchment/400/4 spd! My winter project!