http://www.ebay.com/itm/222741179798?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1558.l2649
This is a rather rare Master Parts Book for Cadillacs from 1976-1981. You can probably catch parts from slightly earlier and later if they have the same basic body shells as well. What is nice about the "illustrated" section is that all of the parts are drawn and in most cases, show their position relative to ones around them. In other words, if you know what GM called the part, you can find it. The day I mail this to someone else I will need it. It has a couple of torn pages but it is in basically slightly shop worn condition. If you have one of the cars covered in the year spread, you won't know how you got along without this book. Never (well almost never) buy the wrong part again. Ladies, your mate would LOVE you to pieces if you got this for him for Christmas.