Rebuilt 302 casting heads available through Rockauto

So if I have a stock 67 273 and I put these heads on, approximately what would the final compression ratio be?
If this is a 2 BBL engine, the final static CR with these heads will be about 8.5 to 8.6. If this is a 4 BBL, then I'll guess around 9.5. (The dome volume above deck with the 4 BBL pistons is a bit murky to me.... IIRC TMM has come up with some of the numbers.)