360 into 64

why so worried about headders, my 65 formula s has a 318 w/ dual exhaust sounds and sounds great with standard stock exhaust. My previous 66 had a well built 318 ran low 13's in1/4 mile with no headders. Why do you need headders again? They are very hard to fit on the early A bodies but can be done with patience if you really need them.....