Now for the backup light power. Interesting that the '63 pulls this from the breaker at the wiper switch!? One year only thing..... Again we can use the original wire after splitting the harness.
White wire is the backup light power, the switch in in the PB mechanism.
Time to make the outside blower motor wire. Anything under the hood is shot.... New new.. Packard 56 ends with Delco covers work great and will plug into the old Mopar housings.
Custom end for the '68 B-Body fusible link and it just bolts on.