I believe he opens it up once a year for a Komen for the cure Charity fund raiser. I don't know when it is.
Its not really a race car museum, More like a collection of his life and racing he's been around, Two of the four buildings are Race Car related and two are miscellaneous vehicles including some rare and one of a kinds.
If your in a car club its possible he may be open to a visit making a appointment to do so. Don't just show up. I took some pics and there are much better pics out there on some hot rod site.
http://www.facebook.com/home.php?#!/...00000460296154
If you get a chance. Visit but like I said, Don't just show up
There is also the 500 museum in Terre Haute run by his son-in-law that has several of his cars. This is only open some saturdays to my understanding, Several of the cars are visible thru the front window with their descriptions. I believe that is on Ohio Ave.