Toyota do make tough motors, but most of them are covered in polution gear, except for the really old pushrod stuff units from the early 70s. I'm guessing that except for the K series motors, there aren't many of those still floating around. Also I'm not interested in an unbreakable motor. If I was I'd stay with a stock 1600 single port. They go and go and go. What they don't do is produce any sort of real power. I'd want something that actually produced decent figures off the factory floor. That's where the Hemi really shines I spose.