Ford built its unibody F-100 pickup for only three model years before quietly admitting the design could not do the one thing a truck is supposed to do. That short run is exactly why survivors are rare, and why builders now go looking for them. This one is slammed to the ground, wears a deep ruby paint, and hides a modern Coyote V8 under the hood. Read on to find out why Ford gambled on a one-piece cab and bed, and why it lasted three years.