So, if your going from a 2V Holley to a aftermarket four barrel. I would use Eldelbrock for all the parts: intake, carb, air filter.
Cheapest way out is to go back to a rebuilt 2V Holley. Ebay has them on "buy it now" or auction all of the time. You should be able to find a NOS for under $300. Rebuilt for $80. Used for $40.
Here's a link to Ebay for a new one:
http://cgi.ebay.com/ebaymotors/Holley-2 ... 3c9cce5c9for auction # 260328807583
Here's a page of parts on Ebay:
http://motors.shop.ebay.com/i.html?_nkw ... m270.l1313