There are a few other things that I thought of that may help not to total your budget
With the Doug's headers you will need a u-joint instead of the factory coupler.
The 6 pack intake is for an e-body the heater hoses are different sizes so what I did to my new intake was drill out the intake hole for the 1/2 heater hose and tapped it so the bypass fitting from a Neon 2.0 would fit and you could have both 5/8 heater hoses and if you use a 90 degree bend heater hose and cut it so just clears the A/C compressor.
I also had to make the fuel line from the pump to the tee making sure it didn't rest on the heater hose or the alternator it is still tight even with the small A/C compressor.
Here are a few more pictures
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