Hi everyone. Recently bought a bunch of small parts for my '62. The parts came from Classic Industries in CA. One was a schematic of a '62 electrical system. It was all color coded and laminated in heavy plastic. This cost $20.00, but have to tell you, it is very nice. You can easily follow the route of any wire. Not sure how long something like this has been available, but I'm glad I came across it, Carmine.
Just enter 62 Impala wire diagram into Google image and lots to choose from. Gotta love the internet... 