The actual boats assigned to RON 3 were 77' ELCOs (PT31-35, 41). My Dad was coxswain on PT34, John Wayne's boat in the movie. The real skipper was Bob Kelly, an almost Wayne-like character in real life. The boats in the movie were 80' ELCO and 78' Huckins boats.
The boats in the sandiego.edu photo are 70' ELCOs (PT10-19), the precursors of the 77' types, to which they were very similiar in appearance.
If you want to learn more about these types, find a copy of John Lambert and my "Allied Coastal Forces of World War II, vol. 2". You should be able to get a copy through interlibrary loan.
Al Ross
Al Ross