Talk me into Fenderwell Headers

I don't have a dog in this fight. Has anyone proven at the strip that fenderwell headers out perform under chassis. Maybe a 600 HP BB but not any SB. My 360 ran 11.0's and my friends 360 runs 10.35. Tony's 360 would run fine on the street with a smaller cam. I just don't understand the reasoning? MY 410 runs 12.34 at LVMS(3500 rel alt) I think it will run 12.0's At Bakersfield with 3.23 and full exhaust and it is a heavy car with insulation and 6 way power buckets now