Hey Peter,
The ke70 (DX) diff is slightly bigger than a '30 one so you can't just fit the centre. Also cannot fit the whole diff as the '70 is coil not leaf.
Sort of doing an upgrade, just keep searching for a correct banjo ke30 centre, should be too hard to find.
Alternatively you could also just swap the whole thing out for a ke55 item which would still be bolt in. :wink:
If you plan on doing an engine conversion in the near future maybe look at upgrading top a T series or cut down hilux conversion now. ;)