360 w. Eddy RPM intake for my '65 Dart - will it fit?

On my 64 Barracuda, which should be similar to your car, I had an Offenhauser single plane high rise manifold. I ran it with both an AFB & a Holley 3310. Used an air cleaner on it that was 14" in diameter with no drop base. Total height of the air cleaner was probably at least 3". I had a slight amount of contact between the edge of the air cleaner top & the lower part of the side of one of the braces on the underside of the hood. Never a problem, just made a little shiny spot there. I think you should be fine with any sort of drop base air cleaner. If necessary, I could measure the height of the Offy manifold I used so you could compare it to your RPM Air Gap manifold.