Although Harold has written/taught various topics on photography
and printing, I can't seem to find what film and developer did he use,
especially for his Coney Island series.
Perhaps others can shed a light?
On his web site, in a comment on the post Available light: Coney Island at Night Harold Feinstein has supported pushing TRI-X (from 200 to 1600) by developing with Diafine for low light photography.