This guy's auction lists the part # for the top as the hemi head crossram top, but the base looks to be an experimental base with the strange snowflake and no casting #. The base is just the normal 302 base so his auction is a little misleading in that it sounds like the intake will bolt onto a hemi head engine. He does say that it won't at the end of his description, but most people don't read that far.
I know someone that has a pair of the heads and a crossram top, but not a hemi crossram base.