The extension/ rear housing is a TA22 Celica or KE30 Corolla box. The front input shaft bearing should be 62mm OD. An early, 79 to 81, AE86 input shaft is the same. Unluckily my spare parts box is away at the moment, a motorsport friend borrowed it for a test fit four years ago and is away quite often. If I can locate him this weekend I'll see what I can do.
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