JR, they probably are standard since ours are the same lengths yet different brands.
64PRO I wanna say the width was 56 1/2" Dont hold me to that as I dont remember but that number keeps coming to mind. I cant get to the front end of the car right now but will measure this weekend. Some dirtbag broke into my truck and I couldnt figure out why they didnt take anything then my wife figured out that all they took was the garage door opener! Thus the lockdown mode for the garage.
The reason for the question was two fold, one the apparent narrow width which isnt really a problem. IVe got late model GM discs on it now and will probably go with the Wilwoods which will push them out some. The other reason is it almost seems as if maybe I had regular length top arms and shorter bottoms. Reason I thought this might be possible is because at close to zero camber the top arms are almost all the way in on the adjustment. If you really wanted a lot of negative camber (which you wouldnt) you couldnt get much. Adding caster will help but it looks like theres a lot built into these clips already. Again, I dont see a problem with any of this but just wanted to see if I got what I ordered. From JR's measurements it looks like they're right.