Agree with what you're saying except on the 2JZ this is best engine ever built. Everything about it is stellar right down to iron black and how it is cast, and the mix of metals. It is stronger than anything engine. The materials are so robust there is no main bearing girdle, doesn't need one. Sadly Toyota, like Nissan, gave up the I-6.
Friend owned this exact car (except the wheels) I loved it. Only Nissan Z worth owning outside of the classics IMO.