Lowering blocks work great, but as a suggestion, I would have some built that are angled. As you have already dropped a long way with coils, The pinion angle of the rear axle is way out of wack compared to the output of the transmission (or steady bearing). You may get a vibration, or wheelhop, or it just may wear out U joints quicker. What you want is a block that when installed returns the pinion angle to close to stock. Try one of the suppliers that advertise in these pages. Also, you may need an adjustable track bar to re-center the rear end under the truck.
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98 GMC Sierra Ex Cab, cowl hood, Euro LED lights, 30 bar billet, Whipple Supercharged 350 Vortec: Forged flattops, E-Tec aluminum heads, Comp Cam, Scat crank and rods, Granatelli Mass air flow, Headers, Flowmaster exhaust , Complete MSD Ignition, Custom Tuning, intake spacer , ported throttle body, AC Delco port injection upgrade, Roller Rockers, Power Pulleys. Gear Vendors Overdrive. Soon to hit a dyno. 2/4 drop(for now).
95 Chevy S-10 Ex Cab 4.3 5 Speed 2/3 drop, Euro lights, billet grill, More to come. The Daily Driver
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