Gasket sets. Pre 1985 and later than 1985?

Does anyone know what may or may not be different between a gasket set for a 360 prior to 1985 and after 1985.
Reason being is I picked up a bunch of parts unopened for a 360. One of which was a gasket set. 1971-1985.
I am putting together a 1990 360 block with 1975 360 heads. Will I be missing anything that this gasket set doesn't come with?

Thanks everyone.
Could it be the gaskets are so old that the application on the box stopped the year they were produced?