Everyone, thanks for the info. My wife actually bought the GTO new in 68, so it's pure stock at this point - should be no surprises as to what's installed. It's a convertible, 27K miles, no power anything, no a/c.
Dan, yes understand and totally agree not to use crescent wrenches - the easiest way to round off nuts. They never stay tight. For whatever little it's worth, I was a wheeled-vehicle mechanic in the army years ago, when the engines were more like the GTO without all the pollution stuff and computer controls, but that's been a long long time ago. Hopefully, I can still do this.
Bear, Yeah, I thought it might be the case that everything won't be in the 'kit' even though that's what they claim. Not sure if it's OK to put this in the post since it's off the subject, but you indicated you have 15" wheels. We're still deciding whether we want to stay with 14" or go to 15". We're planning on getting Crager S/S Chrome wheels and new tires. We have all 14" and suppose we would have to also buy another 15" for the spare if we go 15". Seems like 14" tires are getting harder to find.
Anyway, thanks again guys.