Its a manual top. Driver side is the problem. It is the first joint from the front that is binding. I called it a bushing kit, but it is a pivot bolt kit from Ames. I really do not think it will help, looking at the pictures it appears most of the bolts are for attaching frame and like you said most is rivoted. It is driving me nuts, I have read the top adjustment manual over tried adjusting for hours. How did you determine the top arm was the problem?