Very neat trucks, only an appearance thing. Came with black or white stripes, the color stripes depended on the color truck. Top of cab was painted color of the stripe. Only came on longbeds, only ones known to exist I believe are half tons. No way to tell if its an original dude or not unless you have the buildsheet, which is basically unheard of for the sweptlines. There are some out there, but they're rare. Actual numbers are unknown, but its around 1000 for 1970 and 1000 for 1971, the only two years.
This is just from memory. Don Knotts was the spokesman for them.