The 1956-12 was a Convertible Series event held at Langhorne Speedway on May 20, 1956. Danny Letner won his only career series event, holding off Jimmy Massey by more than a lap. Eventual season champ Bob Welborn finished 8th despite some suspension issues. Stats
| Graph IRI | Count |
|---|---|
| http://dbkwik.webdatacommons.org | 6 |