Vent tube

Dana67Dart said
It would look like crap and would not prevent it from rotating as the OEM dist block has a curve to match the tube.

You've lost me on both counts. First, if it's a nice weld, it'll look fine. Secondly they don't rotate. They tighten down. Simply tighten it down in the correct placement so both lines go straight in and it'll work fine. I don't see the issue.