Good to know....

Turns out, the new headrests I got were for 68-70. I didn't know 67 is one year only, and unavailable. Luckily PG Classics accepted them back for full refund even though purchased last June or so... Awesome customer service!

I removed the back covers and peeked inside my seats, they do have the headrest holes, now I just need some 67 headrests!