What kind of motor can fit into a MGB 1966?

The 1966 MGB originally came with a 1.8-liter inline-four engine. However, enthusiasts often swap in various motors, including the more powerful 2.0-liter Ford Zetec or even the 2.5-liter Rover V8 for improved performance. Other options include the 1.8-liter engines from later MGB models or compatible engines from other British cars, depending on desired performance and ease of installation. Always consider factors like compatibility with the transmission, weight, and balance when choosing an engine.