I also have rat holed a 69 Boss 429 Block, .080 over, has two sleeves, was a running engine, was removed to build a 800 cu. inch engine.  The head have been cc to match. Open chamber, one is a 69 and the other is a 70, but cc to match.....Bare, need hardware to finish.  Thinking about selling, not sure what they are worth.  Thanks Ted N Vegas, Nv.   702-236-9893   gasserted@yahoo.com