Dave,
    The wire between  the alternator and the starter needed
upgrading in our 86 and 85. They both had an unacceptable
voltage drop (across this wire) when all the electrical
consumers were on. In the 85 this resulted in the battery
getting under-charged while running the A/C.

      Ken Lewis
 86 Transporter Crew Cab, 60 T-5 Coupe
 http://neksiwel.20m.com/   O2  sensor monitor gadget, my
cars, Vanagon Tech
 http://EB03.20m.com/  Everybus 2003  pictures