Yes to 1 & 2
1 1956 - years race not held in June, delay re post 1955 disaster alterations
2 1953 - years were first to go past 2,000km, 3,000km, 4,000km (1953) and 5,000km (GT40 1967) - 6,000km????? not with current SC although pre-all that only 5,410km or 397 laps. (Same number of laps as 2 drivers in 917 in 1971!)
https://www.24h-lemans.com/en/news/2...5-000-km-57433