Check the Weber 32/36 sticky at the top of this forum. Reams of information about this upgrade, pretty much any questions you may have are probably answered in that thread.

I have a leftover adapter kit and filter (plus a crummy Chinese carb that you probably don't want) for sale in the Sell To Donate forum for $10 or whatever you want to donate to the board.

If you donate some money, a) you can sell parts and b) keep this site going strong. This is a great community with many knowledgeable heads who have been wrenching on these trucks for longer than I've been alive.