Yeah, yeah, yeah, smartie pants. I'm worried about risking screwing up a valve supporting the brake system versus simply removing the correct valve from the donor truck. By the way, does anyone know if there were rear anti locks with discs, or are they 4 wheel ABS standard with rear disc?

 

ABS shouldn't matter, if you are just swapping brake parts. The sensor reads from the ring gear, and not tone rings at each wheel, so, your current ABS system won't even know the difference.

 

It's a VERY easy swap: a 3/4inch nut, and you pull the spring and valve out. Put in in yours, done. Like i said, I did it on both of my Jeeps. If the valve is the same dimension between the two trucks, it should be a straight across swap, and MUCH easier than swapping the entire valve assembly.