New here with a few questions

Sounds exactly like me when I first bought my car. Welcome to Stangnet. For the intake I'd go with either the Edelbrock Performer RPM Air-Gap or the Holley Weiand Stealth. Both are nice dual-planes that will give you good throttle response and power til about 6k. Headers are definately a good route, and longtubes are said to be better if you don't mind the low ground clearance that you will have (You'll most likely have to go over speed bumps and up driveways at an angle). Putting a whole new exhaust system on would benefit you well and is relatively inexpensive. Carb sounds good. Upgrade to electronic ignition if you haven't already. There's a million upgrades to be done, but those should get you started on the right track. You may want to consider new, wider tires, I can't really tell what you have on there right now, but tires make a big difference.
Good luck! Got questions, ask em, some guys on here know just about everything there is to know.

As it says, just the intake gasket, no biggie. As far as parts go, either
www.jegs.com
OR
www.summitracing.com

will suit your needs with the lowest price available. Tires shouldn't be too expensive at all...rims are another story.

My recommendation on an intake is a current Ford A321 , or Edelbrocks old F4B, Ford's old C9OX or the Shelby Cobra high rise. All these are basically the same intake, and work well with your motor and a Holley 600. Headers? Go with tri-Y's, you'll get the benefit of long tubes plus there's no ground clearance issues. s for ignition, you cna't beat a Pertronix unit in your stock distributor, along with a good set of wires and plugs and a hotter coil.