What is b 61 mack?

B61 Mack is a heavy-duty truck model that was manufactured by Mack Trucks from 1953 to 1986. It was mainly used for construction, hauling, and other heavy-duty applications. The B61 was powered by a Mack Thermodyne engine and had a rugged design that enabled it to handle tough terrain and heavy loads. It had a cab-over-engine configuration, which provided a comfortable driving experience and improved visibility. The B61 was also equipped with a sturdy chassis, air brakes, and heavy-duty axles that made it a reliable workhorse. Over the years, the B61 gained a reputation for its durability and dependability, and it remains a popular choice for collectors and enthusiasts of vintage Mack trucks.