its expensive... $700 ish for a Vortech Carb "enclosure"

otherwise, you can get a rebuilt carb w/ new throttle shaft bushings and seals, solid fuel bowl floats, and build a carb HAT from 5.25" ID tubing w/ a nozzle welded to it for probalby under $100 which would work just as good. installs just like a regular air cleaner.

check out this thing:

http://cgi.ebay.com/ebaymotors/ws/eB...category=38634

this is the other cheap solution... you just have to make sure the carb is built to handle the pressure and doesnt leak.