1968 cab differences from 1969-1972 ?

[201260mark]

Hello everyone, still learning about these trucks so bare with me . I have a 1968 C-10 lwb, the cab on it has alot of rust on top corners , down on the cab corners and rocker's. My question: is there a difference on the cab body , roof , doors , rockers between the years 1968 to 1969-72. My friend has a good cab from a 1971. would this swap with my 68 still keeping the front end ? Any help would be great ! Thanks