'67 GTS w/exhaust tips???

I also have a 67 gts. I have the IBM card and nothing is listed about chrome exhaust tips. When I restored my GTS I researched it and I think the car is suppossed to have turned down tail pipes with no tips. I don't think tips were available on 383 cars until 68 but if the car was a real late build 67 could be possible.

Carl