Exhaust manifolds

Hey guys while working on my car this morning i found a set of manifolds in the back floor board im assuming they came off my 360 but i dont really remember. Does anyone recognize these numbers? Are they any good or are they scrap metal? Im not even sure if they are a matching set. I pulled so many engines back in the day im not sure what these came off of.

20180701_084547.jpg

20180701_084149.jpg

20180701_084154.jpg

20180701_084533.jpg