Sounds like you've got the right ideas. It can't hurt to over build a fuel system, especially when future mods are in store. There are many different types of fuel line to choose from, but make sure it's at least 1/2" line. As far as the fuel pump, what are you're future plans? no sence in buying a pump only adequate for this combo. This might not seem cost efective now, but later on it will be.
Gears....what type of use is the car going to see? Daily driving 3.27's will be ok, but personally, I would opt for 3.55-3.73's depending on rear tire size.
Torque convertor....2,500 - 3,000 stall
Intake...for this combo, performer rpm or equivilant
Carb...Some would argue with me, but I ran a holley 650 double pumper on a milder combo with great success.
Springs...I drag race, so I prefer the 4 cylinder springs. This depends on the type of driveing you do...If you don't plan on drag racing go with the v-8 springs.
Brakes....do yourself a favor, upgrade the brakes to at least 87 up mustang gt brakes....spindles, calipers, rotors...It's a cheap upgrade, and besides the stock brakes are puny to say the least.
Hope this helps. Bryan