I originally didn't want to add ABS but after switching my main cab harness, PCM, BCM, gauges for a 300 special ive been annoyed with the ABS/Break lights on in the cluster.
so naturally a trip to the junkyard was inevitable.
day 1 I brought home a engine bay wire harness / abs pump/ fuse box. its all wired into one piece and I spent less than $60 at my local yard... time spent 3 hours.
after arriving home I immediately put in the harness to figure out "what else is missing"
it turns out one of the lines between the abs module and the master break cylinder are different sizes
I got the ABS line and realized the master cylinder connection is the wrong size, and should have gotten the master cylinder as well. I picked up a break line adaptor at my local auto store.
something to keep in mind is that the ebreak and footwell area has to be completely disassembled
now it took about 3 hours to pull the harness from the donor. I picked up the abs sensors and brackets while I was there. something to keep in mind is the installation into my vehicle is easier because I pulled the transmission and motor to drop in a LSD kit into the trans & rebuild it, as well as add a high stall torque converter.
id expect every bit of 10 hours of work from start to finish. as I have just under that with a bit more (30-60min?) to be done when my steering rack gets back in.
I think if the motor was in then there would be an additional hour because of the sheer amount of stuff in the way.
since my transmission is at the shop for a couple more days I can only assume everything is working. when I put my key in the ignition and put on acc power, to say, roll down the windows there is no more ABS lights.
in hindsight I should have found a concorde limited with ABS as the headlights are slightly different and thus the wire harness is too.
so if you want to add abs make sure you get the engine bay harness that matches your model.