body mount differences between 73-80 and 81-87

[tgh117]

Does anyone know the differences between the 73-80 cab mounts and the 81-87 body mounts other then the look. I am trying to decide which ones to use for my truck rebuild. I have a 77 frame, but I am using an 83 cab and front end. They are both the same price pretty much, they just seem to look different. I want to make sure I get the right ones and will be happy with the end result. I don't need them just yet, still have to yank the motor and paint up the whole frame and everything, but I will need to place the order in the near future.

Thanks for all the help.