Operational 225 Slant Six, Years 68-76

I am looking for a working 225 Slant to put in the '72 Dart. Preferably I would rather get just the bottom end since that is what I really need (I have a perfectly good top end from my original engine), but if the price is fair for an entire engine that would be good too. I'm not looking to rebuild the block itself, so something in decent shape and nothing completely worn out is needed. I'm located on the Western Puget Sound, so I'm looking for something somewhat local. Thank you!