Tyler.. I'm just joking around about the IC stuff. Because you hate IC's so much.
Jay..I apologize man. Whole heartedly, your question was if the spring could be reused and the answer to the question is that I would reuse that spring. The spring itself apears to be perfectly good.
As for reusing a HG, I would never suggest doing so.
As for not hearing or feeling it, I truly can not believe that you could not tell by how it was running. Dude it was running on 5 cylinders based on the picture of the spark plug.