don'tb waste time and money building a fancy set of tuned headers. a simple log will take care of all your needs. I made over 1400hp with a set of 179.00 Sandersen street rod block hugger headers.
The twin turbo Hemi just tested on the chassis dyno used plain old simple log headers to produce 2370 RWHP at 28lb boost. I have yet to have anything more complex in design used on any of my turbo builds. Fancy looks nice but not a must that's for sure
here's the main page
http://prostockhemi.com/gallery/turborr2/

my logs