At the time,they did a series of commercials for a product called "Parson's Ammonia"(it isn't made any more)that kind of had a "The Beverly Hillbillies" kind-of tie in,with 2 actresses playing Elly May and Granny-like characters as spokespersons for the product?

I don't remember the commercial, but I think the product Parson's Ammonia is still being produced.

One 60's commercial I do remember is the Kellogs cereal commercial Jimmy Durante made. That was a good one.