Early Animals stuff too. There is a fantastic live version of Tobacco Road by them on YouTub done slow and moody - Eric Burden's singing is really great on this. Johnny Winter (anyone mention him?) does it similarly. And Richie Kotzen, for an updated one.
I went through a similar proceedure all over christmas, with an 'audition' with a blues band last week. I considered myself a blues fan but actually hadn't gone back far enough - Howlin'Wolf, Freddie King, Willie Dixon etc. It was a fascinating exercise and made me appreciate those old players a lot more. Most of what Eric Clapton, Peter Green, Gary Moore et al play are just a copy and paste of people like Freddie King.
The audition was 'interesting' in as much as the rest of the band couldn't play very well. I am amazed at how people have the confidence to want to put togther a band playing guitar based music when they are unable to play properly themselves. The drummer said 'I haven't played with real people for opver 14 years. Still, I've always been a bit of a busker'. And it went downhill from there. Anyway, I digress. You'll have a blast listening to and learning all this stuff - I did.