Complex sentence: Haywood would have normally driven for a factory-supported team, but was wary of reliability the new turbocharged Porsche 934 and Porsche 935 entries they were fielding and elected to drive with the underfunded Escargot team with their naturally-aspirated Carrera.
Split into simpler sentences: Haywood would have normally driven for a factory-supported team but was wary of the reliability the new turbocharged Porsche 934 and Porsche 935 entries they were fielding. He elected to drive with the underfunded Escargot team with their naturally aspirated Carrera.