The original studio cut of Crazy Train is on "Blizzard of Oz" by Ozzy, if you don't know it, get some tab for this one! It is a classic and not as hard as it sounds (like with a lot of practice!).

Another thing to remember is personalities / chemistry, if you want the gig you will need to come across as some one who the other member not only like but can work with.

Best of luck,
S