Hey hows everyone doing, I hope well

.
Well anyways I'm going to start working on getting a 1990-1996 300zx Twin Turbo. Well heres the thing. I noticed that most of the cars have it least 90,000+ miles and was wondering should I replace the engine? Or just build the engine up and replace everything. I was looking at a RB25 to swap it with or build it up. What would you guys think? I really love 300ZX's and want to know more about them
Lets start a discussion