I'm sure most, if not all, of you already know all this, but I thought it might be helpful for some to know what differentiates each model year from the next. Here goes...
1960:There are two key features that set the '60 apart. The grille is, for lack of a better word, plain with
C H E V R O L E T stamped in the lower portion. The other is the hood 'nostrils' which are divided into 3 sections; the middle being the blinker. Other features to take note of are the dual-headlight design and the wrap-around windshield, also known as the "knee-knocker."
1961:There were very few changes made to this model. The grille was updated, as well as the 'nostrils.'
C H E V R O L E T is now written across the middle of the grille and the 'nostrils' now have horizontal dividers in the inner and outer sections.
1962:In '62 there were 3 distinct changes. The hood was probably the most important update. This will be the hood they use through '66. The next major change is the headlights; going from the dual-headlight design, used since '58, to the single headlight. The change seemed to be undertaken somewhat reluctantly, however, as the headlight section remained wide enough for two. You'll also notice that the grille design has reverted to the 'plain' style similar to that used in the '60 model.
1963:Only 1 significant change was made in '63. The grille/headlight section would undergo it's last major modification, fully committing to the single headlight design. Take note of the circular headlight bezels. This would also be the farewell year for the "knee-knocker."
1964:The major difference is the windshield, doing away with the "knee-knocker." They also went from circular to square headlight bezels. The main thing to pay attention to for the next three years is the emblem on either side of the front clip. In '64, it's the Chevy bowtie with the model (10, 20, etc.) underneath, located on the fender. Another minor change was the relocation of the stamped
C H E V R O L E T to the top portion of the grille.
1965:In '65 the emblem was moved to the outer cowl panel just above the fender and was changed to a side-by-side rectanglular format.
1966:This year, the emblem was changed back to the bowtie on top and model on bottom, but retained the rectangular shape of its predecessor. I was also moved back to the fender.
I hope that was helpful. I didn't spend any time on the bed of the truck, since I don't believe it changed at all from '60 to '66. There were more differences than I listed, but I wanted to focus on those that would help distinguish at a glance. If you have any questions, let me know. I love doing the research.