Hello Ray, and WELCOME!!!
I've got a '62 Ranchero that I swapped in a 200/manual tranny that gets a lot of daily use. Lots of little things you can do that'll add up to some decent gains.
Ignition: If your '69 point dizzy is good, keep it for now. When it needs work, swap it for a Ford Duraspark 1 distributor ('75 Maverick 200). You'll be able to use the '69-style plug wires. Either get an MSD-6A box off of ebay ($60-75), or a Ford Duraspark box or a GM HEI module to fire it off ($10-20)
Cost: new Dizzy/Cap/Rotor ($35), module
Ignition Timing: Bump it up to around 10-12 degrees static, run it as far advanced as you can without pinging under load. Recurve it if you've got some time.
Carburetor: Make sure it's CLEAN inside, and double-check all settings. The Autolite 1100 is a good carb, and should be find until you get down the road and get headers / cam, etc.
Cost: Rebuild kit ($20), cleaner, time.
Wheels/Tires: If yours has 13" wheels, find some 14" ones and go to as tall a tire as you can. You Ranchero likely has at least a 3.00 rear end ratio, probably a 3.20, maybe even a 3.50. The 200 makes enough torque to handle taller tires, and you'll lower highway rpm's and gain mileage. Have to swap speedo drive gears ($5?).
Cost = Junkyard rims, some paint, new tires, new speedo gear.
Headers / Exhaust: I've known some people who split their manifolds, but I believe the only gain is noise and a lighter wallet. One thing you can do that'll be a HUGE help is to port / gasket-match the exhaust manifold. I've got a thread here with pics, you can see that there's usually a TON of material that can be removed.
http://fordsix.com/forum/viewtopic.php?t=31609
That, plus pipes of at least 2" ID and a decent muffler, and you'll be good until you save the $$$ for a header.
Cost: Time and bigger pipes if needed