rear bushings clunk

[subeman90]

so i did the 20 min mod and new RSB bushings in the rear and now I have this horrible clunk. Is this normal with the 20 min mod (more of a rigid mount type of thing) or is it a poly bushing issue thing or is there another issue? I'm not an idiot here I know how to work on a car so I don't think it is my skills lacking so is this normal or ??????????

I got the rear bushings from Summit using the PN that is in another thread here somewhere. I reused the factory "U" mounts but I have to say that the bar doesn't feel that solidly mounted. Opinions?