I have a 66' C-60 and it has 2 i.d. tags in it. One is in the door sill at the top, the other is inside on the drivers kick panel.The one on the door sill has 2 lines and the first reads, BID C-66-201, and the second reads, C6336S214959. The other one has the GVW which is 19,500#'s. It also says, TRANS- C4, and, REAR AXLE RATIO-15-6-15. Also, 2 other places say, WB-157, and CA-84. I have a picture of the one on the upper door sill, but it didn't come out to good.Can anyone tell me about any of this? How do I tell if I have a 2 speed rear end? Thanks for your help, Jeff
