How much would you pay for this 340?

Swinger 340 said

I agree toolman, I think it may be a 318 out of a truck or van, by the shape of the oil pan. I would also assume the heads are from a later SB and not a 340. No X,J,O or U castings on the heads.

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The photo in post #16 says J heads. J's are 188/160 valve heads and are open chambered. 70-71 360 or 72 340/360. The OP needs to do his homework or not pay much for it because of the unknowns. How about the numbers on the block, drivers side front below the cylinder head on the deck surface.