Agreed, I have been a Nissan nut since my first ka24 I built. But no matter how hard I look at it, the 2jz is by far the better motor, believe me when I say it took me a long time to admit it. But I'm sure if you done your research and understand how much horsepower the stock internals can handle, and also how little you have to spend in comparison to rb, then it's a no brainer. Clearance for engine isn't a problem, can be done and has been done before. But you want to be good at welding or have a good mate who is.