issues installing FK #1012-5 Flip kit

[sduckworth13]

I have a 1967 GMC 3/4 ton with 8 lug drum brakes, non power assisted brakes, and manual steering. I'm swapping the complete 5 lug disc/ drum suspension out a 1974 Chevy 1/2 ton truck and in the process of doing a 4/6 drop. I have the 12 bolt out of the 1974 Chevy truck and the leaf spring perches lined up but need to relocate the shock mounts . I bought DJM rear flip kit #FK1012-5 and tried installing it today. The axle locator bracket opening is larger than my rearend diameter. The axle locator brackets didnt even touch my leaf spring perch. I guess since I do have a 1974 Chevy rearend thats probably what I need to try again, although I had bought a McGaughys flip kit for a 1974 Chevy 1/2 ton a couple of weeks ago and took it back. I didnt think it would work, so I didnt try to install it. Here are some pics. I have leaf springs only ( no coils, no panhard bar ). Anyone running a silmilar set up or seen a kit that will work.