The other consideration is a dropped base. This was a Superformance I had about 6 years ago that had a Keith Craft small block 427, single plane intake and I took a Shelbly/Cobra Air Cleaner and a friend cut the base and dropped it so I could run the big element. Worked well. I'm currently running a turkey pan and K&N setup on my FE that I like that has a flat base plate.
