Talk me into Fenderwell Headers

I've got mixed feelings about going with fenderwell headers. I'd like to hear from you all's about why I should go with them. My reservations lie with cutting the inner fenders and taking away from the front end stiffness, structure, etc. This car is to be street/strip driven with 75% street time. How do I handle running the exhaust under the car and out back since I'm using frame ties? Wouldn't this cause the pipes to be run lower to the ground than normal?

Background:
1968 Barracuda Notchback
BB Stroker Build in process
Low Deck
727 Auto
Front to Rear Frame Ties
Mini-Tub and Springs relocated

on my 71 duster i just ran the exhaust under the car along the rocker panel. i used 3.5 inch exhaust pipe and bullet 3.5 mufflers, with a 90 degree turn out at the end. thought the exhaust looked killer that way. never had any ground problems running it that way. i built that car back in the early 90 when there was not much header wise for a big block a-body. at least nothing a poor boy like me could afford. i got the 2 inch hooker fender well headers used at a swap meet nicely used for like 150 i think. best of luck in what ever you decide to use. Mopar65