The truck started out as a 1 ton 2wd dually. I added a 4"x4" square tube to the front and added the spring hangers from a 78 K20. I also cut the frame and installed shackles from a 78 K20. I installed the K20 engine crossmember back then as well. Then I used a pair of skyjacker 12" lift springs. This will have a D60 of some sort in the front but right now it has a D44HD. I had a 79 D60 from a ford in it but the housing is bent on it. In the rear it has 4wd spring hangers in the front. And in the rear I did a shackle flip, basically took the stock shackle and put it upside down and used a different hanger on the frame. Then I used a 6" lift spring and a 4" block. It has a 10.25 sterling dually rear end from a 91 F-350 pick up in it. The truck has a 5.9 cummins in it and will have an allison when done as well. More pics can be seen here at:
http://s181.photobucket.com/albums/x...cher/?start=20
And
http://s181.photobucket.com/albums/x...er/1976%20C30/