Just finished replacing my clutch cable & quadrant, which was much more of an ordeal than expected. I needed to replace the cable with something adjustable, as the stock cable & upgraded clutch had the clutch engaging with the pedal barely an inch off the floor. Not ideal, and hard to drive.
Anyway, I got a BBK kit with adjustable cable, new quadrant, and firewall adjuster. Everything went in OK, but the pedal effort was ridiculously high, and I couldn’t seem to improve the situation with adjustments. After some research, I discovered this is apparently a common issue. I ordered a Ford Motorsports adjustable cable, and replaced the BBK cable & firewall adjuster while keeping the new quadrant. Instantly, clutch effort dropped and things worked as expected. It’s mystifying how the BBK cable could be so awful, as it seemed to have very little friction off the car. Problem fixed, so I’m not going to overthink it.
One additional note: I added some 1/2” ID nylon spacers to the shafts for the quadrant, to keep it properly aligned. The quadrant is apparently supposed to self-align, but the fit was sloppy enough that it seemed there would be potential for mis-alignment.