I work at Tire Rama in the heights, and my boss won't let us do exhaust, but the Central store still does exhaust work, you might give them a call.

Flowtech makes a good set of headers... I have flowtechs on my 4x4 and Sanderson's on my 2wd.

I just put a Magnaflow Stainless on my 79 and love the sound... I'll never put glasspacks on again... they are nothing compared to the sound of a nice Magnaflow. I paid about $90 for my muffler from Jegs.