I've got the body and chassis manual for my 68 Cutlass Supreme 2dr hard top and going to replace the wing window rubber. The manuals tell me which bolts hold them in but little more. What are the nuisances of the job, things I need to know that no book can tell me. I've been putting this job off long enough, just as soon get my *** kicked as do it but I've gotta get it done. Little advice.