definitely need a custom tail shaft, depending of model of cressida might need the cross member, and u need a front sump 1jz so being a supra i think you will need to convert it to front sump, if your using the stock 1jz ecu look around on the internet for diagrams to go from 1jz to 7m to make all your accessories work, i think one thing that wont work is your fuel gauge, and a accelerator cable, and i think thats about it, suprisingly the stock 7m fuel pump will hold out, and hasnt missed a beat