Will a standard stock 1ton bed fit on dodge ram chassis cab truck configuration if the wheel base is same?

No, a standard stock 1-ton pickup truck bed will almost certainly not fit on a Dodge Ram chassis cab truck, even if the wheelbases are the same. While the wheelbase might match, the crucial difference lies in the cab-to-axle distance.

Chassis cabs have a significantly longer distance between the back of the cab and the rear axle. This extra space is designed to accommodate a variety of body styles and equipment, like dump bodies, flatbeds, or specialized work boxes. A standard pickup bed is designed to fit the shorter distance found on a regular pickup truck. Trying to install a pickup bed on a chassis cab would leave a large gap between the cab and the bed, making it unusable.