Hook it up tuner style (i.e., hose from turbo nipple directly to wastegate) and run that summabitch WOT. Provided you don't have boost control issues such as spike/creep, whatever boost you end up will tell you which one you have. Stocker = 12psi; HD = 17-18psi
Google search of first number you listed suggests it is a HD unit.
If you have a mighty vac, you should be able to determine the operating pressure.[/QUOTE
No Mighy Vac but I did Google the part # 1011-673, comes up as HD starting at 17-18 lbs. thanks, Kyle.