fender headers

forgive me guys i'm new here and i have a question. i have a 1973 duster and a 400 bb headers are up on the list. i like the look of the fender well headers. and i understand the tire issue. my concern is cuting the holes in to the unibody, will it weaken the strucker to much. this motor is to be about 500hp. so let me know the wisdom!!!!!:dontknow:
Author: admin