In 1971 Ford replaced both the BOSS 302 and BOSS 429 with the single BOSS 351. It had a completely new and larger body, but was still a competition-grade since it was developed as a possible Trans-Am contender.
Auction Sales History
1971 Ford Mustang Boss 351 Fastback 351/330 HP – did not sell for $47,000 True Boss 351 with 4-speed transmission. Numbers matching 351/330 HP Cleveland V-8 engine. 4-speed top loader transmission. Power steering. Power disc brakes. Factory AM radio. Gauge package. Functional Ram Air hood. Black bucket seat interior. Correct power steering cooler. Magnum 500 wheels with radial T/A tires. 1 of only 1,806 Boss 351 Mustangs produced. Marti Report. Auction Source: Kissimmee 2014, #WhereTheCarsAre by Mecum
Unrestored but for a complete rebuild of its R-code Ram Air 351/330 HP Cleveland engine and Hurst-shifted Top Loader 4-speed, it retains the original drive train, body panels, paint, interior, trim and glass, highlighted by exceptional Wimbledon White paint and Black Sports interior. Equipped with a 3.91 Traction-Loc rear end, Competition Suspension, power steering and power brakes, this rare Boss is also well documented with 3 build sheets, Marti Report, the original Eminger invoice, owner history, and photos and receipts for all work done. Auction Source: 2011 Monterey Daytime Auction by Mecum