I'm having my engine wiring repaired. I have a 85 that I've up graded to a 86. I want to use the Ron Francis Harness. The web site says for 87-88 Turbo. I changed my alternator to the internal voltage regulator. Those of you who have used this harness, did you cut a hole through the firewall so the ECM 60 pin connector can go through to the right side kick panel where the computer is? Will I have to change any connections? From what I've read this is a very good harness well labeled.