Your challenge is to have a significant number of people (mostly poor I guess) from Southern Europe, Turkey and Iran immigrate to these East Block countries in the 1970s and 1980s to better their lives.
Bonus points if a significant number of people from places like the U.K. and Austria also move to the East.
In OTL, there was some immigration from non-Communist countries to Hungary at least, for example a doctor in my small hometown in Eastern Hungary was an Arab in the 1980s and my mom had an Argentinian middle school classmate of Hungarian descent from Buenos Aires who moved to Hungary with his family in 1980.
Bonus points if a significant number of people from places like the U.K. and Austria also move to the East.
In OTL, there was some immigration from non-Communist countries to Hungary at least, for example a doctor in my small hometown in Eastern Hungary was an Arab in the 1980s and my mom had an Argentinian middle school classmate of Hungarian descent from Buenos Aires who moved to Hungary with his family in 1980.