I started with the headers on the rebuilt engine, and also had JM re-curve the distributor and rework the Carb. Also did a bowl blend on the heads- car runs real well with 4.10 gears- so for now the headers stay, but the original look is nice. Main reason I did it was these are high end/ good quality Hookers, which I had- and I wanted a good taste of the cars potential with the headers.