I am not a expert , If you are going to use it for a "427 sc replica" and not race it
don't worry to much about the drilling for more
oil , don't worry
about the old heads , the edelbrocks are a good way to go .
As for the one counter rotating engine , the crank has a grove that
oils the rear seal . When run foward , the
oil wants to go the
wrong way .It needs machine work or somthing .
(Ask George Anderson @ guessford or a FE builder )
Have fun