My buddy is swapping 63s under his first gen quad cab right now. I have thought a bunch about putting them under the back of the j10 as well. It’s got Alcan springs on it now but they were about 6” too tall so I have taken half the leafs out. Still doesn’t ride or flex like I hoped it would. Then I start thinking if I’m cutting off leaf brackets I should just 4 link it and total just stall the project