340 Engine

The big two following the block are the crank and the heads. If it's got X heads- that's a huge deal. If it's got 915 Js then you should make sure whether they're later replacements or T/A heads- T/As would be more of a homerun than Xs. Basically no inexpensive 340s have X heads on them- even the ones that came with them...

The "average" 340 needs work, has later J or other heads on it, or is a late production cast motor. Price is gonna depend on your parts. If you've actually got X heads, it's still got the steel crank, you've got the windage tray, well then it could be just over a K. (those heads go for a lot) On the otherhand if it's not got the windage tray or 90 adapter, the heads are 587 or other later heads, the cylinders need honed or bored, and its got a cast crank in it, and its had cracks in the lifter galleys- well then you're probably looking at something much closer to $400.