440 being rebuilt for 1971 Challenger street car. Car will use a Six Pack, four speed and 3:23 gear. Cam is an old Crane around 270 advertised duration, and lift is under '500, I don't have the specs in front of me right now. Engine will have 440 Source aluminium closed chamber heads, which are advertised at 80cc. I will use the FelPro '039 head gaskets.

I am looking for 10-1 compression, maybe 10.5-1, which piston will give me this with the least amount of block decking? Block is currently stock bore, but will need to be bored probably at least '020 over-size. Rods and crank are stock 440.
Hypereutectic, or Forged? Advertised compression? Brand?