Well, I put some time into research and came up with some interesting info....
Edelbrock and the Chevy community say the Performer Intake is a good piece of equipment, and flow/performs better that the stock unit. The word is that it should make a little more power, and a little better MPG.
Add that to my Banks headers, and it seems like a win-win.
Plus, it looks nice!
The best option for power and economy would have been an "Air Gap" style manifold, as it keeps the intake runners cooler, and therefore the charge denser, but the only ones available are for higher RPM use, and not smog legal.
Now, I did find out that even tho my '84 did not come with an EGR, I decided to get the EGR ready Manifold, and the part number is #3761. That way, I can block it off as my current intake is, or add one if I find later that it should have had one.
Now armed with all this info, I went searching... and found a good used one locally for $100!