In KU-3505, page 2, indicates the engines (Motore) were built by Studebaker. Studebaker was licensed to build the Wright R-1820 during WWII. This is marked on the engine Data Plate.
https://usautoindustryworldwartwo.com/studebaker.htm
Studebaker built the R-1820 (9 cyl.) used on the B-17, but did not build the R-1830 (14 cyl.) used on the B-24. Perhaps the Flak guys may have gotten it wrong.
I'm curious why they only found 6 people total whether B-17 or B-24?