Ref material on 67-72 trucks

[Hosedragger622]

Im sure he info is on here some where, but where, looking for reference material to tell the difference between what years sheet metal i have and what years trucks came with what. Example: what years did the marker lights come in front fenders and bed sides. aslo like 1967 did not have power steering dimples on the frame, small things like that so i know better what im looking at and the all the spare parts i have obtained over the years can be better identified before putting them up for sale. Any help would be apprecitated.