installing 6" lift

[danadena1960]

I bought a used 6" lift kit a while back. I thought the Cat told me it was for a 1/2 - 3/4 ton 73-80 truck. I bought a 1977 K-20 with a 2.5 lift already installed. I recently purchased a set of 35x12.5x15 mounted on a set of 15x10 with 2" backspacing. I went to put them on the truck, no chance, could not turn the steering wheel more then a 1/4 turn with out hitting the rear of the fender. I'm thinking great, now I can put in the 6" lift.
I put in the front springs and tried to reinstall the swaybar, now way. What needs to be done with the swaybar? Next is the brake hoses. Skyjacker offers 2 different ones (FBL28 and FBL18). Does anybody know which ones I need? My truck has a GVWR of 8400 and single piston calipers. Also does anything other then the typical steering arm need to be done? I was looking at Skyjacker dual shock mount kits (67-91 GM all straight axle pickups & SUV's Dual Front 0-12" DS250 $38) for the front and (73-87 GM 3/4T PU; 77-87 1T PU; 73-91 3/4T Suburban Dual Rear 0-10" DS445 $45) for the rear, along with Rough Country Nitro 9000 shocks. Does anybody have any input on these? Now for the rear lift. I removed what I thought was the 2.5 lift blocks and went to install the 6" blocks. Problem now is the rearend housing has pin sticking up and the leaf springs also has a pin sticking down. The lift block has a hole for a pin and a pin sticking out. I had some old 3" blocks so I set one on top of the original 2.5 block. Went to install the U-bolts, no way. They seem to fit the front axe but are to narrow for the rear axe. Is this lift for a 1/2 ton? Can I get away with 2 blocks stacked on each side and order new U-bolts or do I need to order a 6" rear block kit? Now for the Front drive shaft, it has 1 small spot of bindage. Can I simply modify it myself or do I need to have something professionally done?
Thanks,
Dana