I've been researching on this. So far, I know that the Toyota R154 transmission is very similar to the AR-5 transmission used by GM (just a matter of bell housing swap). I currently have an AR-5 transmission and I've been looking around for a 2jz to try to bolt on to. I'm finishing up my 6ve1 semi-rebuild. But the next time my engine decides to crap out, guess what engine is going in... >.