Bolt-On 4-Link

[72 cheyenne pdx]

Since I don't know how to weld and don't have a welder, has anybody here know if a KP Components Bolt-On 4-link for the 73-87 GM trucks will work on my 72 c10 without any major modifications? It currently has rear leaf rear, which I am assuming the 73-87 only came that way. I believe the frames are different from the 67-72 to the 73-87, but I have heard from an unreliable source that even though the 72 body is the same in the 67-72, that GM started re-styling the frame so when the new style truck came out, it would be a quick transition. I have no clue, so please help!!!!