Thought you guys might like to see this. I found it in an old comic book from 1971.
And just in case you're too young to remember Sizzlers...here's an ad from the back of the same comic.
I even found an SSP ad. My brother and I had these too. I think we used to get them ever Christmas for a while. They were pretty popular for a few years.
And here's an add that has nothing to do with cars, but I was cracking up reading it. It's just speaks so much of that period in time.