Long tube headers on my 72 duster 318

headers are about the best thing you can do to a stock 318. they dont rob mpg and increase hp. with pretty much any full length header and a decent flowing 2-2 1/4" duel exhaust i would bet its worth 20hp over stock manifolds. then when you step up the cam and intake/carb it will all compliment each other.

tti, dougs and now schumacker all make high quailty headers that fit nice. they are going to cost you some money though. you do get what you pay for. if your really trying to do it on the cheap i would buy them raw steel and spray bomb then with the VHT header paint and be done with it.