Welcome Lance, to Team Chevelle.....
Probably the first thing you should do is get a '67 AIM (Assembly Instruction Manual). Youtube also has a lot of info. It would help to know where you are located so other members could possibly help out.
Don't know of any "step by step" info out there. If you want to tear it down to bare frame, here's the "short form". Start with draining radiator, remove bumpers, hood and front clip, engine/trans, body wiring and plumbing, body mounts, then lift body off the frame. In that order. Bag and tag EVERY nut, bolt, and piece as you remove them. Take lots of pics before and during disassembly.
If this is your first time tackling something as major as this, get help from someone knowledgeable. You don't want to end up with a car all torn apart and then realizing it's more than you bargained for.
Edit: Just remembered, there is a book called "How to Restore Your '57 Chevy". It shows everything from disassembly to reassembly on a '57 2-door hardtop. The same basic principles could be applied to your '67 Chevelle. I have this book and have used it many times on my Tri-5 projects. EXCELLENT book.