Don't piece meal it. You will always doubt something. Find a motor/vehicle that has all the parts and take them. It will be cheaper and you avoid the little things nobody knows about.
For example there are 2 different distributor housings both look the same but they are different and should be kept with the intake manifold they were made for.
You may be making this way more difficult than it is worth. Really get all the parts from one vehicle. They are not that hard or expensive to find.
For all the parts you need look at aftermarket kits and see what they include some tell you the part numbers. Better yet find the schematics they are on the web and check them out. You will be resorting to the schematics often.
Are you going to run a 700r4. Find a stock harness if so.