I went to pull a part in Jackson and don't recommend getting an engine there. All the hoods are up and the most of the engines are missing something to let the rain in. I'd just use one for a core. I mainly saw 4.9L sixes, 5.0's, some FE's, and a couple 351M's. There are some van's with engines in them that may not have water in them, but what a pain to remove.

I'd try to find a wrecked truck and buy the whole thing, remove what you need and have it crushed