 Complete the following phrase:  In the 1960s and 1970s, Hunt used car junkyards as his quarries and turned bumpers and fenders into abstract, welded sculptures. Hunt also focused on linear-spatial arrangement of his materials where he followed Julio Gonzalezs footsteps into three dimensional structures. This experimentation garnered critically positive response from the art community, such that Hunt was exhibited at the Artists of Chicago and Vicinity Show and the American Show, where the Museum of Modern Art purchased a piece for its collection. He was the youngest artist to exhibit at the 