https://www.washingtonpost.com/wp-stat/g...report-1992.pdf

This report has a lot of great info in it.
-Don't know about Persico, but it seems like Scarfo had a good relationship with Joseph “Joe Black” Gorgone, a Colombo family member.
-The closest thing I could find linking Scarfo and Chicago is when Scarfo asked Bobby Manna to reach out to Chicago to help merge bartenders local 491 and local 54.

https://www.huffingtonpost.com/philip-leonetti/mafia-whitey-bulger_b_2945108.html
Based on this article which Philip Leonetti wrote for the Huffington Post (!), it seems they had a working relationship with the New England family.