Here is a thread that discusses the 1972 STP NASCAR set and the great rarity that is "Lorenzen with car" from that set. I have seen the comparison made several times that the 1972 STP set is the T206 of racing cards in terms of impact.
http://www.network54.com/Forum/52660...+wish+for+%3B)
Another article that discusses the STP set and the extreme rarity that is "Lorenzen with car." PSA has currently graded one example of that card. The link even includes a picture to prove that the card actually exists. I know that Lorenzen with car is the holy grail from that set, but in at least three years of scouring eBay, I have never seen a Richard Petty card or a Bobby Allison card or a Dick Brooks card or a Charlie Glotzbach card from that set for sale, either.
https://sportscardinfo.wordpress.com...week-1972-stp/
Thread in which one of the top racing card collectors is offering to pay just for a scan of the "Lorenzen with car" card.
https://forums.collectors.com/messag...&enterthread=y