The side you showed is correct for a-bodies from 67 to 76, but it's the back that determines if it will fit. I have seen (and probably have) 4-5 different prong configurations from the various years. I still can't find what I need half the time. 2 or 4 prong was only the half of it, the depth of the prongs also differed. If I get a chance some time I'll photograph all of my caps and compare them. The bad part is I don't know what fits what. If it helps, I think you can change the prongs with two screws from the caps to make one work in case yo had a dented one or something, or one the right color.