Edelbrock has known about these issues for at least 3 YEARS now as they claimed they had never had anyone tell them of the distributor issue when I called them back in May of 2017 with my ProFlo3 manifold.
As for the different manifold here is what was part of the ProFlo3 kit.
Would be interesting to know when these other kits were purchased that still have the same problem as seen in the pictures above.
One other point from the posts above, the ProFlo3 was NOT a low cost entry. It was in the $2900 range if memory serves me correctly. As I told them, no excuse for these issues.