Check out my dads 1966 Barracuda "S"

That is definitely a different car...dad’s car had stock original interior and never had the inner fenders cut for headers....sloth I believe he thought about doing that at one time!
agreed. the interior, well, could have been easily swapped out for original interior, if the next owner wanted to do so, BUT the fender cut headers are a different story.. it could be patched/ repaired, but there would certainly be evidence of the repair underneath the fender well, ie, welds, epoxy, filler, etc..

regardless, Pete has a beautiful car, and it is nice to see all of the history behind the car, and how well kept it has remained all these years