Im working on doing the body work on a 67 convertible for a friend that purchased the car a few months back and now that the car is alomost completely apart it shows some signs of something strange , it looks to me like the rear section of the body may have possibly been changed , the welds are not original and you can tell it has been worked on , it has new quarters but it just seems strange, the front section around the windshield pillar seems odd too but the fenders are still on so until they come off I wont be able to see whats been done around the cowl area . Is there anything that is obvious to only a convertible that would be next to impossible to swap out if this type of job was done ? Something I can look for that is distinct ?