Header selection is matter of preference, since most major manufactures' headers seem to perform quite well. My selection was, MAC 1 5/8" Equal Shorties, and to this date, I should have opted for Un-Equals or from other source, I hear that Hooker Equal Shorties are very nice.
The problem with these equal shorties, is that the plug wires, especially the #3 and #7 kind of like to burn.... For all of you with this similar problems, especially the #3 wire, I recommend using Accel 300+ wires. It comes with a long distributor wire, where you can use this for the #3 wire. The boot is not the regular 45 degree one, instead a smaller 90 boot. I have had nice results with these!