It was Brad Waddle driving. He used to run Comp in division 5 years back. I thought it was odd to have one single car make a test pass. Not something that NHRA would do in the middle of their show. It made me wonder if they were potentially testing a different type of combination trying to bring the two types of cars closer together.
On NHRA All Access it was stated that Waddle was testing a smaller tire that the 500 inch Pro Stockers use and it was also mentioned that they were using a different racing gasoline. I suppose it was NHRA spec fuel for Pro Stock. There was also weight added to the car according to Joe Costello and John Waldie on NHRA All access today.