Strangest thing found in your A body???
About all I've ever found in a car (don't remember which one at this point) is a couple pictures of a topless but otherwise not very attractive woman and a penny that someone used a dremel tool on to make a smiley face.
Back in the mid 90s I bought an '88 Dakota, apparently the owner was paranoid that someone was going to steal his stereo because he had that thing mounted in there so it would come out only with great difficulty...there was a bracket attached to the back that went over the heater box and was bolted to the firewall (and seems to have either lost a piece or just mis-reassembled the heater box in the process since the defrost never worked very well). He also filled all the screw heads with epoxy.
Not sure why he bothered, stereo was kind of a POS.