IMHO, don't waste your time with that turbo. I would max out your current combo., of which you can go much faster than you currently are, and wait for your "new" motor to be finished. Then you can go larger to match that combo.
I don't know exactly what your plans are for the motor/trans, ie. cam, heads, tq converter. But the Te45a would be at the top of my list if you have the motor/tranny combo for it.