1st things that come to mind are:
1) engine mounts - JZX81
2) re-route turbo drain and transmission lines to clear the JZX81 mount on driver's side (at lease this was required when I used JZZ30 Soarer VVTi)
3) the output shaft of the trans needs to be adapted. The trigger wheel on the VVTi transmission will not work with the MX83 factory speedo, and will not work with the ABS (if you have it). It requires that you use the MX83 extension housing, modify the parts to all work in harmony (bit of creativity required), and re-assemble with a new gasket and output shaft seal. I think that I saved some pics of the mods.
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