Doesn’t John Taylor mention using a Farquharson in .360 no 2 to take lion off a cattle ranch he worked on in his early days? I know he mentions the cartridge favorably.
The .360 as loaded by Kynamco pushes a 320 grain bullet around 2200 fps, about the same speed the 9.3 X 62 pushes 286 grains. Seems to me the talk of not enough gun is questionable. I don’t think a lion could tell it wasn’t a .375 H&H. Surely it’s enough gun for anything in North America.
I’d keep the gun and use it as is without destroying the lines (and handling) with claw mounts and telescopic sights. It’s not really meant to be a sniper rifle. It’s a fine and elegant gun in an interesting and adequate caliber if you ask me.