You do know that a Turkey Pan is a huge PITA when you have to adjust your carb, unless of course you have a two-piece removable Turkey Pan. I had mine custom fabricated, but the Kirkham brothers now sell a very nice one for about $250 or so. They might even adjust it for your 460, if that's needed. Here's a link to their thread on it:
NEW!!! 2 Piece 427 Carburetor Cold Air Box