I agree with David on the efi wiring. But I went a different direction... I installed a K&R system... With this system you get a switch panel that will fit right into the same location of the one that comes in the car... It attaches to another pannel that your relays and fuses are on. (App 6"x6") . This connection is a single cable and a plug that connects the two. Also in the kit you get wire that is labeled every 6", all the wire ends, connectors, and heat shrink ect. that you will need to wire. The neutral saftey switch, line lock, and what every you have can be wired thru this system.. Its neat, clean and fairyly easy to use....
You can order direct from K&R they are in Cleveland, Tennessee. Can get you a phone number but they are on the web.. Check them out before you buy... Can't hurt.... Thanks Mack