Here's how I did the relocation in my '88.
http://www.thirdgen.org/techboard/elect ... stall.htmlHere's what I did for my battery relocation to the trunk. I used a 1/0 ga. cable from Taylor that runs from the battery to the starter, I then kept the stock cable from the starter to the electrical junction. For the battery recharge I used a 6 ga. cable that runs under the radiator and wraps around to the starter, then it runs parallel to the battery cable (I initially had a 10ga. cable, but it was a weak charge). The battery cable also has a 200 amp Bussman fuse mounted close to the battery, just in case of an accident.
Here are both cables running behind the passenger wheel, into the passenger compartment. There was already an opening next to the passengers right foot filled with foam, so these cables were easy to run through the body. The cables then run under the carpet, next to the passenger seat, and over the wheel well to the battery.
Here's the battery, cables and fuse:
The Bussman fuse (AMG-200) and holder (HMEG), both purchased from National Fleet Parts:
Overall, not a hard install, it just takes some time.