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  "path": "/articles/mack-keystone-vocational",
  "publishedAt": "2026-03-04T10:01:00.000Z",
  "site": "https://www.ttnews.com",
  "textContent": "Mack Trucks on March 2 unveiled a new Class 8 vocational tractor, the Keystone, in the latest phase of a lineup overhaul.",
  "title": "Mack Debuts Keystone Class 8 Tractor as Pinnacle Replacement"
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