Sounds like the same setup I plan to run on my 250. My 2 reasons for doing it are fuel atomization improvements and the underhood coolness factor!
Maybe Im just dreamin, but a used Clifford manifold would be interesting........
As far as air cleaners go, I'll deal with that when the time comes..... thats why I want all this mounted on the engine BEFORE I mock-up the mounts from scratch
Oh yeah, if you run headers, maybe have an O2 sensor mounted in each runner, so you can set up carbs electronically at any RPM
Best regards,