It's a 1979 F250 with a 7.3 Powerstroke 5 speed swap!
Says: Jason Fry (Owner)
7.3 Power Stroke. ... The Power Stroke is an electronically controlled, direct injection engine with a 4.11 in × 4.18 in (104.4 mm × 106.2 mm) bore and stroke creating a displacement of 444 cu in (7.3 L). It has a 17.5:1 compression ratio, and a dry weight of approximately 920 lb (417 kg).