I coverted my 85 to EFI. What a pain!!!!!!!!!!!! Well getting a harness was a pain. I got the whole set up including the tank for 200 bucks!!   But the guy I bought it from was putting it in a 83 so he cut all the wires for the lights, signals, heater,ect off. I found one on PBB from a guy in Canada for 45 shipped!!! I thought to good to be true.......it was!!!! One of the main plugs that had like 17 wires connected to it was fried!!!!!!!!!   So I ended up wiring in a new fuse block to the stripped harness to run lights and wipers and such.  Plus some of the wires running to the engine are not even hooked up.  They just had no where to go!!!   But at any rate, it was worth the time and frustration. Idles up side down!!!!! till the pump has no fuel to deliver!!