Has anyone documented the differences between 67/68 and 69 deluxe seats. I found that the seat bottoms are the same for 67-69 but that's as much info as I've been able to confirm. Does anyone know the differences between:
* 68 & 69 seat backs?
(Any other differences besides 69 C/W headrests?)
* 68 & 69 Deluxe seat covers?
* 68 & 69 Deluxe seat foam?

I found this in FAQs:
The frames of the two years (68-69) are the same. The difference is in the padding. 69s were slightly wider. If he wants it 68 correct, use a 69 headrest seat and buy 68 padding and seat cover.
And this on a vendors web site:
69 Firebird seat have the same insert design as the 67-68's, but with a little different fit.