If you have to replace front-end parts, go with Moog parts. I get mine at o'reily's and they have a lifetime warranty on them. That way if they ever go out again just have to go in and swap out for new ones.
I haul cattle and horses in mine and my wife (horse owner) was adamant about not having a cattle pannel in it so i put 1 x 2's and screwed them down in an X pattern.
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IXI
I did one of these in each section of the trailer.
