Go Wing Install

The inner skins were not stamped for holes until the mid-year 1970 spoiler was introduced as an option.

That said.........

The car looks awesome as it it without a wing. ;-)
I guess if it has access holes, you're golden. You can mount the wing, or not, your choice. If it doesn't have the holes, you can still make your own access holes. That's what the early '70 e-body owners did to mount the AAR-T/A spoilers. They cut round holes with a hole saw, and if they really wanted to go the extra mile, they'd grind the round holes square to duplicate the factory look.