I’m conflicted

So I’m currently debating wether or not to mod my Mustang. I recently got a 2009 v6 s197 and I’m debating if I should mod it or keep it stock since it’s going to be a collectors car in a couple of years. I want to mod it and have fun with it, but keeping it stock is also nice for the money if I sell it (which I don’t plan on doing). The pictures are recent and it’s in amazing condition.

Any advice?

The mods Id be planning to do would be: 4.6L swapping it (for the sound) Roush front bumper All black grille Exhaust