[mmiddle]

Depending on the model of Heddman headers. The high end ones migh be a better fit. But if you bought the cheapies... Then I would be supprised if they lined up well.
Also, the made to fit exhaust system you have is most likey designed to fit their brand of headers and asume that other manufacturers are close enough.

A little tweaking is in order for you.

I would check the motor mounts just to make sure the motor is not leaning