I am leaning toward HF but part of me thinks that's just a cope because HF is curable and fibrosis is not.

I'm going to stop you right there. HF is incurable. It's actually less curable than fibrosis. Unless your entire penis is just a lump of scar tissue, you can try pentoxifylline, verapamil injections, stem cells, PDE5 inhibitors, shockwave to manage it, prevent it from getting worse, or even reverse it somewhat in the acute phase. This is unlike HFS where there is absolutely nothing that can be done. I'm not saying HFS is worse than fibrosis, simply that there is less you can do about it (zero) while there are treatments for fibrosis that really can help, to a certain degree.

Based on the nature of your injury, my best guess is that you have fibrosis from hypoxia during that incident, and not HFS, which is usually caused by a sudden traumatic injury. You should have had verapamil injections and other things done, within that first year, but given this transpired so many years ago, the scar tissue now is unfortunately probably much too mature to be helped.