Very cool find, I've been in your garage and would think you're just scratching the surface on stuff you have stashed away. I really like that sanger shirt, never seen it before. When Billy Jr blew his dads 'Rated X' over in the early 80's, (worlds fastet jet) I tried to talk him into doing a shirt just like that one but with the rated x boat upside down and billy still hanging onto the steering wheel that he ripped outa the dash. He was pretty messed up from the crash and didn't see any humor in it. There were a few TV shows at the time using the footage of his crash in the opening credits of their show and he wasn't making a dime on it. I thought the shirts might bring him a few bucks.
Horrific crash, lucky he lived.