What is your thinking on the shocks? Are you going to restore the car to be completely stock ? Or are you looking for the stock look, with upgraded performance ?
Make sure you take a lot of pictures before you take it all apart and package and label each subassembly as you remove them. Believe me, it will save you a lot of grief. Actually it would also help alot if you get an assembly manual before you go too much farther. It will save a lot of broken or damaged parts when disassembling. Everything doesn't always come apart logically.
If you are worrying about the value of your car, the 70-71 will always be more desireable and valuable because starting in 72 and up there were fewer options available. No longer available were the 383, 440, Hemi, six pak carbs. Convertibles, high compression engines, shaker hoods, in 73 came 5 mph bumpers, more emissions, less power. and more. As a plus though in 72 Electronic ignition became standard and in late 72 power disc barkes became standard also.
Really the best of both is to keep the body stock and upgrade the things that make a car a pleasure to drive, especially if you haven't driven cars this old before. Things like radial tires, gas shocks, poly bushings and new,top quality suspension parts. Power disc brakes if it doesn't have them. Those will really make a big difference in safety. If somebody ever wants the car totaly stock, these parts can always be changed back.
Take your time, ask lots of questions, (no question is a dumb question) take lots of notes and pictures ( we love pictures) and we will always try to keep you encouraged with your project.
