The 1956-22 was a Convertible Series event held at Soldier Field on June 30, 1956. Tom Pistone won his first series event, holding off polesitter Curtis Turner. It was a closely contested battle over the final laps, as Pistone only led six laps and only holding off Turner by six carlengths. Eventual season champ Bob Welborn finished 11th. Stats
| Graph IRI | Count |
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| http://dbkwik.webdatacommons.org | 6 |