An excellent choice. I remember Grand Funk as the featured band on "New Years Rockin' Eve" one year when I was a kid...though I wasn't playing guitar yet, I dug their stuff a lot even as a wee child. Farner is one of the best rock voices ever. And dig them puffy sleeves on the drummer!
Trivia...or one of you guys will know this immediately. When did Grand Funk become GF Railroad? They added that at some point.
JoeMan