Thanks for that ddgonzal !
Was doing it off my phone and it wasn't very easy.
Yes the yellow lines are the places i took the measurements from.

A pressure wash revealed 21R on the bell housing so that's what the gearbox is off I'd say.

Those are links to web pages that includes photos

Is 153mm the distance from the automatic main case to front of the bellhousing?

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Thanks for that. A bit more thinking to do but it looks like a cut and shut might be the best option.

I know a few others have done it but I've not seen a detailed right up on it. I can think of a bunch of things that could go wrong....

Sorry only just measuring this now for you. It’s 63mm from the Bell housing to the input shaft. The Bell housing is 153mm

Anyone recognise this bellhousing pattern? I'm not having much luck tracking down what toyota motor it fits. From there I hope to find a drawing of the pattern so I can design up an adapter....

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Just found this again http://datsun1200.com/modules/myalbum/photo.php?lid=25422, if I can find one for the box that's half the work done!

not anymore i sold it to a guy in nsw

Thanks for that info mate... you dont have a original injection manifold laying around in the USA??