I've been running the fabtech springs for about 2 years. Very happy with them. They flex well and ride well with no sagging. As far as bushings go, they are a standard size poly bushing. Weather or not they come with bushings depends on who you are buying them from.
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4.0, AT, 3.5 Fabtech, 1" SRS, 1" BL, 35x13.50x15 Toyo MT's, HP30, TJ shafts, Lockrite, 8.8, Power Trax No Slip, 4.11's, Warn bumpers, W8274, SYE, and a bunch of other stuff....