http://67-72chevytrucks.com/vboard/s...d.php?t=317654 here you go. All bolt on but the brake lines. If I remember right, the drivers and passenger side were switched, and the bracket was pulled off, and turned around, and then bolted to the spring cup if I remember right. That was the best way to route it with out any binding or rubbing.
On my setup, I'll be using a factory disk/drum MC/prop valve. You can get away with out it, but you won't be using the disks to their full potential. I'm half way there with disks but the drum MC. It stops pretty hard for an old truck, but the peddle is mushy in my opinion, and the rear likes to lock up a bit easy. If I recall right, this is fixed with the disk/drum prop valve. But, trust me, with 12" disks this truck will stop like a champ when it needs too.Teach her good pedal control and it's a safe beast to stop quick in all weather. I've had to do emergancy stops in it in the wet and today when dry, and all things considered, if this was my 1990 Firebird, it would've been much scarier.
CPP sells 6-lug conversion rotors if you wish to keep it 6 lug.