Don't forget a lid then. My old roomate michelle put a lid and a cutout on her 02 WS6 and it ran a 12.87@107 and dynoed 331rwhp in an auto and those were her only mods.

A lid will help, with the smooth bellows, and exhaust. There is also the free ram air mod too. I did that on Nikki's Z/28 and it helped alot.