360 rebuilder wanted

I just talked to a guy & I think he has what I've been looking for & the price is right. It's supposed to be a complete running 360 from a '91 Dodge truck. I looked at the picture & it looks like it has LA heads. I also talked to the guy & he said he's pretty sure it has 5 bolt valve covers (he'd have to go look to be sure). He's gonna look for casting numbers, stampings or whatever he can find & email them to me. What do I need to find to be sure this is an LA roller cam block? The LA heads & a casting number newer than '88 or so should cinch it, shouldn't they? Is the casting date number on the left side where the displacement number is? It's been a while since I've looked at one. Here's the pic of the engine.

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