Before sending them off for cnc porting, you may want to check out the Hughes site, and their references/warnings about those heads.
Apparently, their program makes the intake bowls so big it could break through at the head bolt area between the two ports, and the back side of the bowl by the header bolts.

I guess I’d want to verify that where ever you send them, that they know their program has been used successfully with the PC casting, since it’s likely they would have used an actual Victor head to develop the port/program......and it seems the PC’s aren’t as thick in all areas as the Vic’s.