If you do get to the track talk to Donald Davidson the track historian. He knows more about every car there than any of us ever will. I am sure he could set you straight with what is correct and what is not on the current configuration of the car. He is also a nice guy who happens to be good friends with my sister in law.
Also go upstairs to the photo shop. They have 100,000's of photos from all the races (including the 1909 balloon race Bob) That they will make copy's of for you. The coolest photo I have seen of the car is from a few years ago. They pulled it out in the morning light in the snow right in front timing tower. My son got a large print made of that on.
If you can not tell you have hit on one of my favorite subjects the Indy 500. My father worked on the cars in the sixty's, My brother was on a few teams in the ninety's and I even built steering wheels for a few of the cars in the 2002 race. I still have a lot of friends on teams. I have been to every race from 1968 but the first one I remember is 1970 and the Johny Lightning car.
Like I said I have pictures of under, over, inside and anywhere you can think of of this car so just let me know if I can help.