Pretty soon here (when i get the money), I need to replace the fuel injection wiring harness on the vette. But as I've looked around, I have only been able to see the harnesses for 1986 models and up. What is different from the 1986 L98 and the 1985 L98? And I've read that when replacing the Fuel Injection Harness, I should also replace the Emission Wiring Harness to. Is this a necessity? Thanks in advance guys.