OK, thanks much Gentlemen !

That's good enough for me.

I have that truck, it's a '79 LRE, and was told the original motor/tranny were gone. Rearend was swapped out too.

But the tranny case came with the truck and the guy made a big deal about it.

The hilarious part is, the case is broken. I can guess what happened to the original 360.

I'm doing some garage cleaning and kind of wanted to throw it out anyway.

So again, thanks for the ID help !