16 year old needs help with disc brake upgrade!!!!

I did the swap on my 71 dart this spring. I reused the 71 pitman arm, idler arm, centerlink, and lower control arms. If you are doing the 73+ disc brake swap you need large ball joint upper arms, 73+ disc brake lower ball joints, 73+ disc brake spindles and bearings, rotors, calipers and so on. As far as alignment set them close to the old ones, then set the steering wheel straight with the front wheels on a pile of old magazines (to help the wheels move freely). You then adjust the tires so they are straight measuring on the tread of the tire so the front and back are about even. That should be close enough the drive to an alignment shop. You'll get there I'm sure, throw up some specific questions and there are plenty of people with answers here.