Here is a pic comparing it to a new 2V RPM airgap. The port is essentially the same size but is raised a little if you look at the pics.
On the left is the RPM Airgap. Note that the port is more or less centered on the larger intake bolt holes. On the right is the active. It's same bolt holes are a little below the centerline of the port. If you were porting the 2V heads, I am sure you could match them up. On Stock 2V heads, there will be some mismatch, but nothing like a standard 4V intake.