Just to be clear, the Victor heads are not cnc ported, they are cnc “machined”.
They’re nice heads, I’ve had two sets through the shop...... I just don’t feel they’re the right choice for this application.

If reusing the current heads is off the table, the latest version MP heads made by edelbrock would be the right choice imo.
Next would be the Indy SR.

Both would need some prep, as would the Victors.