It really is nonsense to claim as a blanket statement that RP cams do not work. In the same EMC contest that Jon Kaase won, post #65, He also had a 429 Ford entry that had a RP cam, 264/256 @ 050. He came 5th out of 29 entries listed in the results in PHR magazine in Feb 2009. His engine recorded the highest hp, 746, of those listed.
A recent trend has been to use lower ratio rockers on the exh. If the cam is a single pattern, you are effectively converting to a RP cam, acknowledging that the extra lift & duration is not needed.