The adaptor you are looking at there is for a MHI TD05.
Here is a drawing of the TD05 flange (not my drawing)
The stock RHB5 turbo flange bolt pattern on your FE-8V is 55mm x 55mm with a ~45mm diameter inlet hole.
Anyway all of that is besides the point, do not run a T3/4 turbo on your engine.
It is way too much turbo for the engine and the car will probably be slower overall.
That is unless you can actually get a compressor map for the turbo and confirm thats it suits the engine.
Most of the china T3/4 turbo's are based on the old T04E compressor wheel, the smallest of which will only start to come on at about 4000rpm.
Then there's the fact that your stock oil drain will no longer work as the turbo will be hung lower than the drain port in the block.
So you will have to weld a bung to your sump and redo your oil drain hose.
Thats not such a biggie but something you may not have considered (and it sounds a lot easier than it is to have a good non leaking welded drain bung)
And then you will also have to sort out a new turbine outlet pipe.
Depending on the actual turbo you are getting this may mean removing you air conditioning.
In the end there are a few well known bolt on upgrades that will probably suit you better.
Check out the VF12 link in my sig' below for one example.