There were two versions of the end game on weekly syndicated '70s Jeopardy.
The first one was like Treasure Hunt; you chose one of 30 numbered spaces, which had Trip (usually to somewhere in Europe), Car (Chevy Vega, I think), $3000, and two halves of $25,000. I don't remember anyone ever getting anything other than the trip or the car.
They quickly switched this to the one most people are familiar with - at first, the prize levels were ($1-999) Chevy Vega, ($1000-1499) Chevy Caprice, ($1500-1999) $10,000, and ($2000+) $25,000; in the second season, the top two were changed to 2000-2499 and 2500+.