A trophy to me isn't the biggest rack on a buck, or the best plumage on a bird, it's the memory of a great hunt. That's why my mounts are those of fond memories. Every ding, every dent, every scratch, even a bad refinish is all part of the memories of a rifle. About 50 years ago the front sight was lost from my grandmothers rifle, my father filed a roofing nail to fit the front dovetail slot and it was used that way until the 80's when my dad made a nicer one by hand out of brass. I could source a new sight, refinish the wood, reblue the metal and have a very nice rifle. But it will have lost all the marks and history of its life with those that came before me.
If it was me, I would try and make it shoot, and leave it alone. And if it doesn't shoot, I would put it away and find another just like it to hunt with where the old girl can't go.
But I am a sentimental fool....