If your using a jzx81 box you will need to use a 1jz convertor and flexplate.
I am running a a340 out of a jzx90 and had to change to the 1jz flex plate and convertor onto my 2jz as the bolt spacings for the convertor are slightly different.
The 2jz belhousing will not fit inside the 1jz a340 bellhousing unless you use a j3 bellhousing but then im not sure the splines will line up.
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