I know its like finding a needle in a hay stack but I have a very original 67 RS/SS with untouched original interior.Where would be the best place to look to possibly find a build sheet ? Under rear seat ? Carpet ? etc.Any info would be greatly appreciated I dont want to tear it apart if I dont have to.Thanks,Rob

If it's a LOS built car.... nowhere.
Otherwise, it could be in several places..... glued to the top of the fuel tank is a very common place that it's found. Usually missing or weathered beyond recognition. Sometimes they're found crammed into the seat springs - front or rear. Or stuffed up behind the dashboard somewhere. Or up inside the headliner.
It's a crap-shoot.

It is an LA built car did they not put them inside the car ? Also how else can I tell its a real RS/SS ?

For a 67, the cowl tag should tell you if it is an RS/SS.

If it's a LOS built car.... nowhere.
Otherwise, it could be in several places..... glued to the top of the fuel tank is a very common place that it's found. Usually missing or weathered beyond recognition. Sometimes they're found crammed into the seat springs - front or rear. Or stuffed up behind the dashboard somewhere. Or up inside the headliner.
It's a crap-shoot.
I herd that los built cars had the build sheets on them in the places you posted.

Not sure about '67's but the '69 Camaros built in LA had the chassis broadcast copy on top of the gas tank. If you have a low mile, low exposure to the elements kind of car it might still be there. It's just an 8 x 11 piece of paper.

Doug

A friend of mine found his voit sheet above the head liner near the rearview mirror. also a los car.