Mark Farner and Don Brewer’s Grand Funk Railroad were alternative superheroes on the ’60s/’70s cusp, when US bands could live high on the hog thanks to outdoor shows. Dogged by mismanagement and internal strife, the Railroad knocked out meaty riffs under the auspices of producers like Todd Rundgren and Jimmy Lenner, and this well-stuffed set includes their calling cards?”We’re An American Band” and the absurd “Walk Like A Man (You Can Call Me Your Man)”. Quite a period piece.