You can request to see them through the Freedom of Information Act. Be forewarned though, they will most likely be heavily redacted.
I hate when they do that...probably half or more of Carlo Gambino's files were unreadable or redacted.
I know a few times a year the FBI releases files on different people on their website but i don't recall ever seeing Dellacroce's. You can make a FOIA request but it usually takes a long time and i think they might charge you per page...not positive on that though.
