Finish Line sells a turkey basket.
I am also running a Genesis 427. I have run it both with the turkey basket and with the stock air cleaner as shown in your picture. No real difference in the way it runs, but the turkey basket looks cool.
If you have not already done so, I would check the float levels. The main float was running way to rich on mine and once properly adjusted made a noticeable difference.
One needs to do a bit of trimming to make the turkey basket fit, but it will work.
Here is the link to Finish Line's page:
http://www.finishlineaccessories.com...37b897225efc9f