The repro Corvette L88 air cleaner has probably the deepest drop you can get. It is designed for a holley so you may need to modify the front entry fuel line if you are running a Quadrajet.
You can make your own here's a thread I have going in "wrenching secrets" http://www.v8buick.com/index.php?threads/how-to-make-a-star-wars-air-cleaner-base.332131/
From the photos I've seen, the "Star Wars" air cleaner isn't tall enough to use with a drop-base. I think you'll have shrouding problems over the top of the carb.
