Pardon my naivete. I am in the process of rebuilding a '68 suburban. I have the front end torn apart in preparation for drop spindles and disk brakes. My question; how can you tell if the control arm bushings are worn and stupidly, how do you replace them. It seems to me that the bushings are part of the end nuts, is that the case? I have everything apart and clean and am just trying to save money (ha ha) at this point. Thanks for any help you can lend.