A good center section from Eaton is $500 by itself, not even including everything else. I'd go elsewhere, this seems like some Chinesium bullshit made for people trying to rebuild the rear in their POS Malaise Era dog on the cheap, not a performance kit. The stock ring and pinion on our 10-bolt rears can take a TON of power. Stock gears will take you into the low 10s easily. You can save money by just inspecting your ring gear when you pull it apart. Usually they don't really warp or wear, they just break. You can pick up a Richmond bearing kit from Summit or Amazon for around $100-$150, an Eaton Posi center section for $500ish, and some Redline fluid for around $15-$20 a quart. If I were you, I'd get a c-clip eliminator kit from Strange (they have the part number listed at GBodyParts for street cars, I think it's Strange A1033), a 30-spline center section, and 30-spline Strange or Moser axles to match (Around $250 for a set of 2) because you'll already be in there, might as well make it better all at once. You can call Moser or Strange when you get the axles and ask them what bearings you'll need if you want to, too.
