A 1972 Chevrolet C10 left the factory with an engine that would struggle to merge onto a modern freeway. This one wears Satin Orange paint, 20-inch black chrome wheels, a custom interior, and an LS1 where the tired original small block used to sit. That swap has become so common in the classic truck world that an entire industry exists to support it. Read on to find out why the LS became the default answer and what the 1972 model year means to collectors.