I'm not doubting that's what the seller told you, and I know a lot of options did exist off the books. My dad custom ordered a '72 Charger SE and it had options that were not available in the combination he had, but he was a Chrysler engineer and had it done his way by working with the dealership to get what he wanted. I wish I had the window sticker and build sheet for that car!

If you still have the VIN number it would answer one big question in my mind.

If your car had a 350 2 bbl it was NOT a 350 H.O. That was a specific engine and drivetrain package. The stripes may have been added by the dealer before delivery. Likewise, the rocker panel Sprint badges were paired with 4.1L Overhead Cam hood badges on a flat hood on a Firebird Sprint.