I can try and help what ever way I can. I have done a bunch of partcaster builds. And I am working on another one.
Scale length, neck pocket shape and bridge dimensions are really what are going to determine what your choices are. I would say 90% of strat necks and bodies are interchangeable as long as they maintain the traditional neck pocket and neck bolt holes.
For your bridge you will want to know what the hole spacing is to mount it. those generally go into three groups. American six screw vintage bridge, Mexico and import six hole bridge, and two point. Plus floyd rose which is a whole other issue.
Good tools to have for this is painters tape, a sharpie, precision ruler, a chunk of candle wax, a set of good screwdrivers, sharp drill bits and a drill, hex keys that fit the bridge and truss rod, a small block of wood, sand paper in various grits, solder and iron.