You'll need to run a TON of brake lines, meaning bending pipe, flaring ends, etc. You'll need the ABS unit itself, the fuse box for it, new knuckles that have the mounting for the abs sensors, the sensors, new rear hubs and front axles with the ring gear for the sensor on them, and I'm sure more. That's all that I can think of off the top of my head.

Oh, and abs sucks... I've almost gotten into accidents while driving cars that had it because I was counting on the brakes locking up. It sucks in the snow, cause the tires can't bite in the same. Personal opionion, and not many share it. :fawk: