NEED SCHOOLED ON 67 CUDA ROCKER MOLDINGS

yeah, trim code, order option, The rocker moldings are different on every year model fish. The 68 type called spears and gills might have been most popular and most ordered but any of them are pretty rare. More so today due to many of the low numbers produced being damaged. VGC are quite valuable today.
Why dealers and customers would order wheel opening moldings without the rocker moldings... Cost was a factor. Wheel opening moldings are easily thrown on with a hand full of screws. The rocker moldings have special plastic clips on little studs welded to the body, and screw holes in fenders and quarters depending on which type. If I see one with rocker moldings and without the wheel opening moldings, I assume the wheel opening moldings were removed by owner.
Back in their day there were old farts who were dedicated to taking care of their investments. They would remove the 2 bolts from below the dog leg section of fender and pull out on the fender some to flush out the pine needles and other debris trapped there. They had seen the rust caused by trim on vehicles too. So they had there reasons for not wanting rocker moldings even though they could afford the option.