Looking at a used small block tomorrow...

Going to be looking at a used engine and I want to make sure I'll be checking it all important things before I make a decision. Also, what should I offer the guy? I know it'll depend on condition.

The guy says it is a 360 that came out of a 76 Dodge pickup, possibly a Power Wagon model. Says it ran when pulled (yeah yeah sure) and it's been sitting in his garage for 4 years. The truck was in a roll over (???). I'm mostly into it for being a functional engine that can get new gaskets and things like a water pump and carb and run it. I'm thinking of pulling spark plugs to check condition, and renting a video scope from work to peek inside to see cylinder walls and piston tops. I'm going to maybe pull a valve cover to check for any sludge. Breaker bar to make sure the engine is still free to move. Am I missing anything? Thanks for the input!
Is there a reason you can't go to a Pick-n-Pull and just get a magnum motor? They're like $200 and come with a six-month warranty. You need a $200 manifold and a $50 fuel pump.
Do you have a motor now?