Yep. Sounds like the rod snapped.

Give us some background.
Why did you initiate the tear down? What symptom/s prompted you to tear it down? Did you have a rod knock prior to the tear down?

 

Pay particular attention to the crank journal and the cylinder wall. You might be in it for a Crank or a block.

 

If you can push one piston down in its bore without any of the others moving then you have either a broken wrist pin (not likely), a piston broken just below the rings (not likely) or a broken connecting rod. I suppose a broken crank is another possibility but I've never heard of that happening in these engines. Was this vehicle picked up as a non-runner or did it stop running while you owned it?

 

I pulled the oil pan and took a look - didn't like what I saw. Looks like the connecting rod snapped and lodged into the side of the block. Where do I go from here? New block? Buy a used engine and swap them out? The truck is currently in Kansas City. Wonder if I can get a donor truck with a decent engine around there?

 

pictures would help, it possible the block can be saved, it will have to be re-sleeved though.
I see your in CA. there is a company in out the that specizes in sleeving rover block LA machine or LA sleeve something like that.
It's that or a used motor. what about the crank? if the crank is damaged just find a motor, you will spend twice the money on machine work