Will a 7.3 liter diesel engine fit in 1975 Ford truck?

It is theoretically possible to install a 7.3-liter diesel engine in a 1975 Ford truck, but it would require extensive modifications to the vehicle. The 7.3-liter diesel engine is significantly larger and heavier than the original engine in the 1975 Ford truck, so the frame, suspension, and brakes would all need to be upgraded to support the additional weight. Additionally, the engine mounts, transmission, and exhaust system would all need to be modified to fit the new engine. It is important to note that such a project would be complex, time-consuming, and expensive, and it may not be feasible to complete.