Yes, you could shuffle paper to get a 61.75 private VFR ONLY with the 320 type. And then pass the FAA IR written and checkride to have "US TEST PASSED added to the 61.75 certificate. Then if you completed the ATP CTP, passed the ATM written and passed an ATP ME checkride AND IF you can show your training for your foreign 320 TR was conducted by FAA authorized instructors you could get the 320 type added to your ATP. I've never heard of anyone who could document the status of their foreign instructors.