I wouldn't ever run single exhaust behind headers. I have Summit chambered muffs and a Dynomax duals set up.
Well thanks for that advice cuz I've been contemplating If I should keep it single (because the truck came that way) or go Dual.
Is the muffler guy gonna have a hard time adapting a dual exhaust to my 86 if I take it to him?
And any idea how much they would charge to run pipes all they way from the headers to past the rear axle?
Thanks.