Well, I can get how one could argue how Torture Garden really doesn't have heart, and is just as many melodies crammed together as complexly as possible. I personally like that, though.
There are some refined traits of Naked City's spastic hardcore minitures. You just have to listen closely. An excellent example is Speedfreaks which I believe literally changes genre every couple of measures.
Terence Hill, as recently confirmed during an interview to an Italian TV talk-show, was offered the role but rejected it because he considered it "too violent". Dustin Hoffman and John Travolta declined the role for the same reason. When Al Pacino was considered for the role of John Rambo, he turned it down when his request that Rambo be more of a madman was rejected.
Al Pacino = God