Well here is that 'mate from New Zealand' turned up bright eyed and bushy tailed.
Thanks for the thread Mark and thanks for the info so far.
I'm after a std pattern with 5th as overdrive. I'm going to put it behind a A12 but am hoping to upgrade the engine to a A14/15.
A friend contacted and said he has a datto 5 sp so I went down there and figured if I turn it over by hand I should get some idea if its a dog leg or not by what way the output turns when I turn the input spline but...
If I put it in the forward left position I can't turn the spline, the same in the rear left and the rear right. In the forward and rear middle and the forward right I can turn it over but seems straight through so I guessed my figuring didn't stack up.
Its a smooth box and on the right side it has the nissan logo and '60'. On the top front of the bellhousing it has 'E B 0623764' that's the only codeing except #10 on the left side and #4 right rear.
here is a picture
Datto box photo