The 1981 Toyota Pickup came with a 2.0-liter inline-four engine. The 22R engine is a larger and more powerful engine than the 2.0-liter engine, so it will fit in the 1981 Toyota Pickup. However, you may need to make some modifications to the engine mounts and exhaust system in order to install the 22R engine.
Overall, the 22R engine is a good choice for upgrading the engine in a 1981 Toyota Pickup. It is a reliable and powerful engine that will give your truck a boost in performance.
