hi there i found me a upgraded harness last week at the junkyard. it took me 1 hour to remove the harness and i was not concerned with being careful of parts i removed to get the harness out. i labeled it as i went. before i pulled this harness i would have been very hesitant to do the swap. but now i i feel confident to do the swap. i would change the two rubber hoses back by the firewall for the heater core. i would also remove the intake manifold to do the job. i would guess at least 8 to 10. hours for the job. i heard a experienced mechanic can do it in 2 or 3 hours. one mechanic quoted me three hundred to three hundred fifty dollars just for labor. good luck.

My son did his harness and I did mine (both 81 K-Jets) without any previous experience with wiring harnesses. Basically you are unplugging and pulling out old wiring, cleaning up everything, and installing and plugging in the new harness. Label everything as you unplug. There are a few problems that come up, and it does take some time. I don't think a shop could do a careful job in one hour like you mention. Maybe, but it sounds really fast to me. On our K-Jets we had the intake off when we did the job which made access much better. Good luck.
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Thanks to everyone for the help, Doug C. 81 242 Brick Off Blocks, stock, M46; 86 244, 140k , auto.

AS a supplement to this message: Is the WHITE Chrysler distributor cap the screw-on cap, and the RED Bosch distributor cap always a clip on? And if so, does the system with the clip-on cap ALWAYS have the 25a fuse on the driver's side (American)? If so, then I know which ignition harness I need, and I hereby suggest that to distinguish these two systems instead of referring to distributor cap COLOR, they be referred to by clip on/screw on (because my borg-warner cap is greyish in color).

I tried it...and couldn't finish it. I did what I could. I removed the upper and lower intake form the motor. All of the A/C stuff (because it no longer worked) and hoses. I got most of the harness in, but couldn't get the engine block drivers side harness to fit. It was too short and needed to go UNDER the fuel injection unit. Laying it over or behind would have been perfect. I plugged in as much as I could and had a shop finish it. $400 down the drain. When I got the car back and it has never ran right. I spent 2 years of spare time trying to figure out what went wrong. Starts up perfect, idles perfect, runs smooth, but will stall out when I put it in gear. I turned the idle way up to abut 1800rpm. It's the only way to keep it from stalling. It's parked in the garage for now. I'm thinking of a 5.0 v-8 conversion now. Cutting into a good harness will make it a little easier than the old melted mess from before.
Ben