Hey guys. I just bought a very rough 1968 Firebird coupe from original owner. It's been sitting in a barn since 1981. Only (significant) rust is in floors and a little in the rear window channel. All the interior/exterior colors and accessories match the fisher tag...but It also has a "yw" motor with original 7028264 xe carb. Could it be a real HO car??? No aftermarket parts anywhere. What do you think?