[jocko]

To answer the rest of your question, you have truck/van rallies pictured. Car rallies were 5 slot. Color of the rally should be gray/silver. Car rallies were argent silver. Above is correct, they were never offered on 67-72, but so many folks retrofitted them that many think they are originals. They were available in 5 and 6 lug. (6 lug from 1/2 ton 4x4s - and HIGHLY sought after by todays K10/K5 crowd as well as the 60-69 crowd because they are a direct fit and clear disk brakes if the pre-71 crowd is inclined to add disks to their trucks). You are correct, center caps should be chrome. Replacements made of plastic are available, and they are actually quite nice. The yellow bow tie (a clue that they were never offered in 67-68 because the bow tie is not red, or 69-72 becuase the bow tie is not blue) is a trademarked piece and can be hard to find sometimes.