tri-x 400 in hc-110 for about 7.5 to 10 mins, give similar results of alot of his work.
However, remember that because he metered for the area in which he was shooting, adjusting exposure every few minutes, and using the "hyper focal technique" for focusing (that is, not really focusing at all but stopping down to f/8-11 and adjusting focus the focus ring so that the distance of most subjects would be in focus, and then leaving it there) when he was shooting, his friends who would print his work did a lot of dodging and burning, and that does add to the look and feel of many of his pictures.
The goal of HCB's methods were to think very very very little about photography thus freeing your brain to impatiently wait for composition to line up perfectly. Additionally, if you keep the same style throughout all of your work, particularly a tri-x based one, composition becomes the only really important element to your work; and copying HCB's film/developer- achieved style will not give other photographers the impression that you are just copying HCB, because not only do so many photographers use similar film/dev combos, but many of HCB's highly respected Magnum comrades share the use of "his"(even though it was his friends who always developed and printed his work) film/dev combo.