Excerpts from Wikipedia :
"Tony Pompeo, an American car dealer of Italian origin, was pleased with the previous Bandini 1100 and 1100 sport he had purchased, so he explicitly asked Ilario Bandini for cars to run in the 750 cc engine capacity category. Pompeo sent a Crosley engine to Bandini for him to study and use. Lightweight and compact, this American engine was very versatile, having been used with boats, aircraft, and even in fire pumps. [...] With the modified Crosley engine, the 750 sports torpedo was launched, contesting scores of races: hill climbs, road courses, and airbase circuits, as well as challenging six and twelve hour endurance events, such as the 12 Hours of Sebring or Mille Miglia, both of which were World Sports Car Championship rounds."
"Following the Amica, Siata introduced the 300BC Barchetta Sport Spider in 1951. The Barchetta Sport Spider was designed by Mario Revelli de Beaumont and built by Nuccio Bertone and Rocco Motto. Around 50 production models were created and predominantly featured either a 750 cc Crosley or 1100 cc Fiat engine."
So an Italian etceterini with Crosley engine is not that uncommon...