I scored a few more Hot Rod Magazines at a swap this weekend. All from 1974-1976.
Here is a small teaser from an article that covers the Third Annual National Truck-In in Bowling Green Kentucky in 1975.
"Over 4500 vans and 18,000 truckers came to Beech Bend Park in Bowling Green Kentucky, for what was to become the largest participant-oriented automotive event in the history of the automobile otherwise known as Truck-In '75."
Man, look at those vendors and all their product. $30k in sales was probably half a years' worth in just one weekend.