Surprise, Surprise, It's already broken! Apparently, somebody had already tried to remove the chassis and damaged the case.
What I thought was a loose screw rattling inside was bits of plastic. The am/fm dial popped off just like DavGoodlin said...easy. I may be able to salvage this case with some superglue since one of the plastic screw bushings is a clean break from the rest of the case. Should I replace any of the ceramic caps or just the tubulars and the electrolytic can?