"Running the Indianapolis 500 would certainly be a highlight, and doing another 600 miles in a Cup car on the same day would make for a special weekend," he admitted. "The Indianapolis 500 is an iconic event and having an opportunity to go through the testing process with Michael and Andretti Autosport, the defending series champions and two-time winners of the race, is pretty cool."
For the time being, however, Busch's focus remains very much on the day job - stock car racing. After a bumpy time of it in 2011 which saw him grow increasingly frustrated, fall out with car owner Roger Penske and leave the Penske Racing team by mutual agreement over the winter, Busch competed in 2012 with the small Phoenix Racing team before finding a new home at Furniture Row Racing for 2013.
He was at Indianapolis this week taking part in a two-day tyre test with the team, part of the preparations for July's Brickyard 400 Cup event at IMS. The track time he had this week will be useful to him for the race itself - unlike next week's IndyCar outing which will bear little or no comparison.
The fastest qualifying lap at Indianapolis in a NASCAR Cup car is 186.293mph (set by Casey Mears in 2004); by contrast, the fastest qualifying lap in an IndyCar is 237.498mph. In the current DW12 model of IndyCar, Ryan Briscoe claimed pole position for the 2012 race with a lap of 226.484mph
"I am looking forward to this test and experiencing IMS at the speeds the Indy cars run," said Busch - and it will certainly be interesting to hear his thoughts on the comparison on Thursday.
The program of events for this year's 97th running of the Indianapolis 500 formally begins with Opening Day on Saturday May 11. Qualifying takes place the following weekend after a full week of practice, and the race is on the afternoon of Sunday, May 26.