order of rank in styles??

[badgto]

What I am asking is what is the names rank as.
Such as custom 10, cst, cheyenne, and so forth.
My daughter is wanting an older truck and we are looking at a 1972 custom 10 that even has factory tilt wheel. At least it looks like a factory column from that era. The question being is like C-10 the base then what is up from there. Any help would be appreciated as the name implies I like the old stuff and her wanting something in that area is just too cool.
Thank You
Robert.