The comparison with The Assassination of Jesse James (etc!) is not a lazy one....
Eric, I'm in shock! But this is the sort of 70s movie I like. I think I can safely send you in the direction of The French Connection and The Yakuza. The French Connection is also notable for it's use of sound. I think nerdy film term "diegetic" is apt at this point...
Just remembered another good 70's film in that vein...Charley Varrick