1976 Valiant, weight attached to rear floor.

Huh, never seen one on a car before, and the only weights I have ever seen were the ones on the rear of the tranny.
I could be wrong about it being a zinc block, but it sure looks like one.

That's interesting. I thought it was a weight. From the way it
was attached it had to have come from the factory that way.
It has a # stamped on it, 3642917. Thanks for the input.