havnt been on these boards since i was workin on my 64 galaxie(had to scrap it ) now working on my 80 Camaro, ive been having a tough time with the exhaust so i wanna buy an entirely new set. i wanted a dual rear exit system because its wat is originally on the car but all i've been able to find is true dual exhaust kits, which im more than willing to do but my question is, do i have to alter any parts of the car to fit a dual exhaust system?