[60-66]

The cam bolts holding the bed down were put in after everything was painted and the bed attached to the frame. So yes they stayed natural or zink plated. On GMCs all or most of the perimeter bolts that hold the wood to the sheet metal were zink. Here on the Chevy you see they are painted. Notice on this truck the very front of the bed wood to bed panel bolts are on top of the paper and end up body color. Ill find some examples of GMC bolts. I believe we need some bed detail pictures from OEMforme's 66 Chevy ! Like Yelmer mentioned also there will be some differences plant to plant. I've noticed a mix of painted and plated bolts on all of these trucks. If you look at picture one of the blue inner fender the one next to the bedside is still natural while the rest are painted. This particular truck I had the chance to see in person. Original tires , original everything.