I bought a running plain jane camaro last year and am going the pro touring route. I bought it because the cowl tag was a true X11, but it was never an SS. I took the cowl tag off to smooth the firewall, and it will be put back on and noted as such. I also had to replace the dash, but I cut out the VIN plate and welded it to the new dash. I have replaced almost every piece of sheetmetal on the car.
But I do not consider this car rebodied! I have done what almost everyone else who has a 36 year old car has done and that is replace rusted sheetmetal. Maybe some replace it over time, I just replaced it all at once. But it's still not rebodied - it's restored!