Strangest thing found in your A body???
My '73 Duster had a lolipop in the ashtray when I bought it. The previous owner told me it was there when he bought the car, he thought it would bad luck to get rid of it. I threw it out the window on the drive home from his house.
I helped a guy move his Chevelle (that had been sitting in his father-in-laws backyard for years) not too long ago. I popped open the hood to get the motor started, put my hands down on the radiator support, looked around to make sure everything was where it belonged. I looked over towards the fender and saw a black and white face looking at me. I thought it was a stuffed animal until it showed me it's teeth. I'm not sure what it was but it looked pissed.
The first car I bought was a '65 Skylark that I bought from the original owner - a little old lady who said she only drove it on Sundays. The ashtrays in the back seat were jam packed with roaches.