Saw this set also on ebay, had the box been in better shape, may of bid on it.
Its the first Service Station Special, from 1971. Although the set components are fairly common, the boxed set itself is pretty difficult to find. In all my years of collecting, I've only seen a few at best. One of the Greenberg's books estimates production at 1000 pieces. Wonder how accurate that number is.
Last month there was a pretty nice one up for auction, photo below.
