Howdy all, here a link about a discusion to some old school turbo info dealing with a 250cummins! Hope this might be helpful!
Does Anybody Really Know What Turbos Were Used in These Old Cummins Engines? [Archive] - TheDieselGarage.com
Does Anybody Really Know What Turbos Were Used in These Old Cummins Engines? [Archive] - TheDieselGarage.com