Hey Scruffy, welcome to CHR. I thought maybe I was the oldest living hot rodder at 63, so it's good to see another senior twistin' wrenches.

WOW, that's quite a lot to have on your plate isn't it. But not to worry, there are plenty of fine, knowledgeable folks on this board who are willing to pitch in and help. I'll start off by offering up a list of widths from several different cars.
http://www.teufert.net/other/rear%20...dimensions.htm