Well, watching a video of Joe Walsh tear up Rocky Mountain Way, and what do I spy in the background? 1st the bass rig, with what looks like a Coliseum head, and then I see that Joe himself looks to be using a Model T! You can see it at about 14 seconds in, with his echoplex sitting right on top of it.
http://www.youtube.com/watch?v=qF2OP_gFsz4