Tom,
Looks like we are in a similar dilemma. My next problem with modifying the scoop to accomodate the Performer RPM is that I also want to get enough air filter surface to provide the required air and that is really tight in my kit. If I raise the scoop by about 1.5 inches, I can get the RPM manifold to fit, but still not enough space for a big enough air cleaner. I'm thinking about also widening the scoop so I can get a 14" drop base air cleaner in there. Then I would have a shot at the filter area I need. Of course, I also have to visualize how much of a detriment this will be to the look of the hoodline. I'm not trying to faithfully replicate, but I am concerned that it might look too strange to look good.
Decision, decisions......
Chuck