Reply to "2V or 4V heads"

4-V heads have intake ports 2-1/2"x 1-3/4", so it seems these are 2-V heads. Note that these "tiny" 2-V heads had bigger valves & ports than the largest Chevy small block heads ever built, so its all relative to what you want. Another way to tell is by the big "2" (2-V) or "4" (4-V) cast into the head on the outside, above #1 exhaust. It's visible on a running engine but you may have to wipe grime off covering it.