Jerry,
One word of caution. Unless somethings changed with the AC body, do not mock up the pipes prior to mounting the body. The body on the drivers side is not the same as the body on the passenger side. You will find the pipe on the drivers side will stick out and not be parallel with the body.
I made that mistake and had to re-weld my brackets. Also, see in the pic below the header attachment.
You are welcome to come up to Fairfield and take a look at my setup and pick my brain. Check my build site at
http://www.priveye.com/cobra.htm
Roscoe