I haven't had one of those here in a while, but as I recall the edelbrock made version has the "E" inside a circle for a foundry mark on them, but I wouldn't swear to that.

To look at them in person, it's easy for me to tell them apart from the earlier version.

Looking through some notes, tested on a 4.250 bore without a notch for the intake valve, and piece of 7/16x14 bolt threaded into the head bolt hole so it's basically flush with the floor, the early heads flow 3-teens, and the edelbrock version mid-320's.

A bigger bore, or a bore notch for the valve is worth a few cfm.

What I would consider a "normal" port job, no holes, no dimples, no tubes, they flow 375-380.
If you make them "bigger", they seem to flow more, but that usually seems to require some tubes.

The new Victor heads flow just over 400 ootb......and they have tubes in them already.