I just picked up this 92 Z34,It has the twin dual overhead cam 3400 with 5 speed and have fallen in love with it, I'm not familar with this engine and what I'm looking for is some knowledgeable opinion"s on this engine's reputation and what exactly the Z34 stands for. I'm thinking on sinking some money into the mechanicals of the car, Is the 3400 as good as the 3800. I've had 3800's in the past and they have all been dependable worry free engines. Well anyway would appriciate any advice.