Thankyou Hanno, those numbers tell me the set/s I have been looking at on ebay are not correct for my vehicle. Each listing has different identification methods that do not necessarily include original Ford part number.
This one has a kit number and bolt width is listed as 1+1/8". No mention of bolt length! Bolt part no. is indicated as 81T-3111, so I know that doesn't match. There is a VERY broad range of vehicles stated as compatible, including some "1942 Army models"
This listing has modern kit number, and two measurements given, which I guess must be the bolt. At.0.822" x 5.860", I assume that is the bolt dimensions, BUT they are different to the first listing.
I'm finding all this quite confusing, as there is some overlap in stated compatibility, but when you look closer.......they are entirely different sizes!?!?! I suppose one could be oversize, but thats a big difference isn't it.