I have two sets, at least one is orig GM box. I can get the numbers off them and someone may know what they are for. I had a 50 one-ton and not for them at least. It was an odd one. Seems like these are sized about like other fella here mentioned. 5-3/8" or so and seems like 15/16" or 1" is all, but I could check on that. INterested? I will sell each set for $35. I paid more off net, but I have no old trucks now and sold off most of my parts I collected. I can get info, numbers and send a pix if you wish.
