HELP! Need 318 Head Suggestion (info provided)

If you haven't already purchased your rebuild kit yet, suggest you specify a 1970 or earlier piston. This piston sits highest in the hole of any stock 318 piston.

FWIW: My Demon has a '68 318 with 302 heads, Performer, AFB, and mild Crane cam. Compression has been measured at 9.2:1. No milling. The 302 heads also provided me with good valve seats for unleaded gas. Throttle response is good. Haven't really hammered on it yet as I don't trust the 7¼ to put up with much abuse.