I had to do the same on my Chevy. I moved the pin box to it's highest setting, and put 2" blocks on my trailer axles. All level now. I used a ladder laying in my pickup bed to cradle the pin box, while I unbolted it. Using the front levelers, I was able to adjust the height and re-bolt the pin box to its highest setting.
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2019 Keystone Montana 3560RL, 2020 Chevy 2500 HD, Firestone airbags, Air Lift wireless compressor, Curt gooseneck, 20K Reese Goosebox, TST-507, USMC combat vet & retired LEO. Robert, Anika, Breanna, Dylan (daughter-in-law Stephanie). & our Great Pyrenees Layla
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