The engine mounts need modifying. I am running a custom throttle cable. I haven't heard about the auto gear box mount.
Why not go rb25det? I have an rb20. But only because I got the bolt in package at a good price. If I was to do it from scratch. I would have started with the rb25
they aren't quite that hard to work on. I removed both the heads on my old z31 while the engine was still in the car. There is quite a bit of room once all the piping is removed
I was lucky enough to have a short ride in Paul's track car. When he stabe the throttle, I am pretty sure my eye balls hit the back of my scull. It is definetly te fastest car I have ever been in.