Edelbrock Victor small block head……

When they first came out they were offered in the “pro-port” configuration, which is tiny ports, and no seats or guides installed(they came in a box of parts).

I had a set of the Semi-finished ones here a few months ago.
Those were cnc ported, but had unfinished guides and uncut seats, and no valves.
All I did was fit the guides to the owner supplied Ferrea valves, and machine the seats.
I was pretty impressed with the flow(360+).
They’re pretty solid heavy castings.