The engine in the Mitsubishi FD50N
Fitment for the Mitsubishi FD50N centres on the Mitsubishi S6S: 4.9L / 300 cu in, 6-cyl inline, 98 x 110 mm bore x stroke, about @ 2600 rpm, Tier 2/3. Serial number on the block settles the exact version. New-surplus and rebuilt stock ships from Houston.