I had to do the same, making my warn plow for my old 700 work for my 500. You need 2 pieces. The part that attached to the 520. And the piece that attached to the plow. Or have something fabricated. I used the warn site to find the part numbers and then searched the internet and found a site that saved me $100. After it is all done, works great, but I could have bought everything new, from other makers, for the same price of the 2 warn parts I needed.
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