I really don't see why the 71-72 B bodies and the 73-74 B bodies are lumped into one category. The 71-72 is a totally different car than a 73-74. The 73-74's are a transitional design that kind of resembles the 71-72, but has more in common with the 75-79 B bodies as far as suspension and driveline goes. Why not give the 71-72 their own section, and the 73-74 their own? 66-67 have their own section, and they have more in common with the 68-70, than the 71-72 and 73-74's do.