The 72 should be 72mm major (exducer) diameter for the compressor, you would have to take the compressor housing off to measure that. There wasn't a tag on it anywhere?
72mm being just under 3" you would be making a fair ammount of air. Do you remember what the trim on the turbine is and the A/R on the turbine housing.
It might be too big for the application you have in mind (ie will take a mont of sundays to spool).
If it has a divided turbine housing you could use a diverter to help it spool, but then you'd have to buy one.
