Watch (the boy's of Bonneville) DVD or online. Tons of footage, even some of the brutal wrecks from Daytona Beach ect.
The M.M. 1 was originally a Duesenberg street car .
#2 they installed a aircraft engine (the only way to make big power back then) but the stock reinforced frame just couldn't handle the huge engine. So #3 was built bigger to accommodate that giant engine which brought speed up significantly.
At the museum they have a book you can get, that has #1 pictured and the story behind it all.
If you can go, I'd suggest do it sooner than later before the book is gone.