Is this a good deal for a 340?

I've only owned slant 6's up until this point so I'm a total V8 newbie.

I met a guy who has a 72 340 block for sale. He said it's bored 40 over and has had all the machining done to it. Told me it was ready for a rebuild kit, some heads and it's ready to go. He also told me he can either throw in a forged crank or a cast crank that also has the matching flywheel, balancer and all that. He wants $600 for it.

Do you guys think this is a fair deal? If it is, would you guys get the forged crank or all the cast pieces? I'm just looking to build a standard 340 so I don't need huge horsepower or anything. Just an upgrade over what I have now. I figured I'd do my research and ask here first because I don't know much about these engines. I do know that standard blocks without any machine work done to them go for about $500 in my area.