mid 69 uni-body changes

I know around April / May 69 there where changes to the

K-member / swaybar

rear crossmember / gas tank hole ?

and holes by battery on front radiator support.

anyone know of more changes? or have any info or estimated dates of the changes?

I know around April / May 69 there where changes to the

K-member / swaybar

rear crossmember / gas tank hole ?

and holes by battery on front radiator support.

anyone know of more changes? or have any info or estimated dates of the changes?

I have a January car with an oval filler neck hole. If that helps