I wanted to keep the factory (1nzfe) motor in the car for simplicity, the fact that I just like them and yes fuel economy.. so I set about adapting a t40 transmission to fit.
I went with the t40 transmission as mainly a mock up for a future t50. I wanted to use it as supposed to a j160 as it’s on the smaller side so I have to do minimal modification to my transmission tunnel and it will be more than capable for what I’m wanting to do with it.
I started off using a t2 bel housing which was a lot cheaper than cutting up a 4age housing. The t2 one was a lot longer than what the 1nz clutch assembly was used to so the input shaft didnt reach therefore a simple adapter plate wouldn’t work. I then decided to use the fwd bell housing and adapt off that. I had to keep the end off the t2 bell housing still as it has bearing supports at the end of it. The clutch assembly is all still the same as the standard fwd setup and the input shaft from the t40 has the same spline count so it all worked quite well. I will attach a photo below of how I adapted it.
thank you Dudley in this group for supplying me with the transmission.