Ford completely redesigned both the B series and medium-duty F series and departed from using the same grilles as the lighter duty F-series trucks. The hood was also longer and flowed into the fenders. This generation became the first of the B-Series to be powered exclusively by diesel engines; their increasing popularity in conventional school buses led to their standardization in 1990, following suit with International (Navistar). The new grille was rectangular with the single headlights being placed very near the far ends of the grille. Ford could not sign a supply contract with Blue Bird without being in breach of contract with Freightliner. While the 7.0L gasoline engine remained standard on the medium-duty F-Series, the 1995 B-series shifted entirely to diesel-fuel engines, using Cummins-sourced 5.9L and 8.3L inline-6 engines. Sold alongside Blue Bird Vision after 2003. The 1958 models saw a new grille and quad headlamps along with new circular gages. For 1991, the Caterpillar 3208 and Detroit Diesel V8s were withdrawn (following the discontinuation of the latter); it would also serve as the final year for the 6.1L gasoline V8. As a cowled chassis (produced without a cab) with no interior, the B-Series was produced with a revised dashboard from the previous generation. While primarily used for school bus applications in the United States and Canada, the chassis was exported worldwide to manufacturers to construct bus bodies for various uses. Both the B series and medium duty F series were to gain their own look. The new design implemented a flat, single piece winshield and headlights that were integrated into the front fenders giving them a more modern look. After a 50-year production run, the final B-series cowled bus chassis was produced as the sixth-generation medium-duty Ford F-Series ended its model cycle after the 1998 model year. From 1996 to 1999, Carpenter used the Crown by Carpenter brand name on their buses. For 1995, the medium-duty F-Series underwent a model revision, improving the aerodynamics of the hood design, with the B-series following suit. For 2000, Ford re-entered the medium-duty segment with the F-650/F-750 Super Duty. The 1956 buses got a new wraparound windshield and restyled dashboards as well as a new grille that was similar to the 1953 model year. During the mid-1980s, the rear-hinged hood was discontinued as the tilt-forward hood improved engine access and it was a design that had been adopted by Ford's competitors. As an option, a tilt-forward hood was introduced alongside the standard rear-hinged hood; on the B-series, the tilting hood would become standard by the end of the 1980s. The quad head lamps were replaced with single lights integrated into the grille. Thus, Ford's only entries in the bus market are currently all based on the E-Series; unlike the B-Series, the E-Series bus chassis is a cutaway chassis that is used not only for school buses, but for shuttle buses, paratransit, and other commercial uses. All American (second-generation/third-generation/A3/D3), F-Series Super Duty F-650, F-750 (Blue Diamond Truck),, Articles with unsourced statements from April 2011, Articles with unsourced statements from November 2018, Creative Commons Attribution-ShareAlike License, Ford was the only non-International chassis to be bodied by AmTran. The new chassis and front fascia made the truck look lower and wider than previous years. In 1957 the B series got a redesigned front end and a new dash area. Although the medium duty F-Series had the revised interior from the lighter duty trucks, the B-Series carried over the dashboard from the previous generation. The Ford B-Series was a Type C (conventional) bus chassis manufactured by Ford Motor Company from 1948 to 1998 and was used primarily for school bus applications. Elements of its design were developed further, becoming the Blue Bird Vision; in place of a commercially-sourced chassis, the Vision uses a proprietary chassis. This generation of B-Series would be the last to utilize the same front fascia as light duty Ford trucks. For 1985, as part of a joint venture with New Holland, Ford introduced a 6.6L and 7.8L inline-6 diesel sourced from Brazil. The fenders were even more flared than before to allow for a wider track and larger wheels and tires needed to make the necessary gain in GVW to remain competitive. The fenders were even more flared than before to allow for a wider track and larger wheels and tires needed to make the necessary gain in GVW to remain competitive. For the B-Series swan song, the chassis stayed the same but the new aerodynamic cowl was applied.