The early 1960s saw American automakers building some very special and very limited editions of production models that appeared to be stock, but were hiding some tricks to make them race-ready.   This 1962 Chevrolet Impala Z11 is just such a car.  A factory-built lightweight racer, this car features a high-performance 409 engine and aluminum body panels to reduce weight.    The restoration was debuted by Jim Mattison at the Muscle Car and Corvette Nationals in Chicago.  
 
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