Yup, you'll break the winch or the cable, LONG before you break the mount.
good on ya, Stanley - I LOVE making stuff, even if it's JUST "stuff".
I spent a couple days, making this "load leveler" out of ford flathead water pump bearings, and an old scissor jack screw, "just cuz", when I could have saved a whole bunch of time, and effort, just getting one from Harbor Freight, pretty cheap. But, then I wouldn't have had so much fun!

As they say, the journey is as important, as the destination...
R