The 1000 uses a completely different clutch arrangement and needs a 1200 bellhousing. I just did it with my 1200 wagon - the box itself is identical to a 1200 4 speed.

I have a Toyota T50 alloy case with a custom adaptor (by me) and Datto auto bellhousing sitting in my shed. the only thing that's stopping me from finishing it is some clutch travel problems which I don't have time to look at yet.

When you consider the $400+ for the Dellow (actually closer to $500 with GST) it's probably still worth it considering that it's easier to get parts for and the cost of the box itself is about $150-200 if you look hard enough...