"The RB20DET is a direct drop in, right after you flip the oil pan, and oil pickup 180 degrees. If you have a 5-speed Trans in your car currently, all you need is the 280zx Automatic transmission mount, and the motor will drop right in.
Better late than never I guess. I've completed an RB20DET swap into my 280zx and I can honestly say that if you really wanna do it, do it. Don't let others decide for you. It's your car, make it what you will. Aside from that, I love my RB20. I like the fact that I used my 5 speed tranny cross member to mount my 20 trans. I like the fact that I could use my stock drive shaft. Would I do it all over again? Yes. Most definitely. I think I made my car even more "mine", so to speak."
Has anyone done this swap and can tell me if this is kind of what happens when doing the rb20det swap?