GREAT write up jorb!! Another thing on those coils (resistors) you mention on the back of the switch, they should have a ceramic/silica coating on them. If not you can recoat them with Autocrete Hi-Temp Ceramic adhesive or find a NOS switch.
Tim
"Pay attention to the details! It ALWAYS pays off."
1949 Chevrolet 3100 Series 1/2 ton Pickup 1964 Chevrolet C10 (Ol' Yella) (SOLD) 1958 Chevrolet Biscayne 2 door (SOLD) 1970 VW Beetle