Greca´s first name was Angelo. That may be why there´s nothing about a "Giuliano Greca" out on the internet (info and pictures). I have posted some info on Angelo "Jilly" Greca, do a search on here and you´ll find the post. No pictures though, I´m afraid.

This is his Social Security Death Index:

Name: Angelo Greca
State of Issue: New York
Date of Birth: Wednesday February 16, 1927
Date of Death: April 1980
Est. Age at Death: 53 years, 1 months

Location of Last Benefit Paid:
City: Brooklyn
County: Kings
State: New York

His father Joseph Greca was also a made guy with the Colombos (Profacis).