You could probably use the exhaust manifolds off a Z31T and the stock T3 from a 84-87 Turbo, or a hybrid T3/T4. Many Z31 guys get ahold of the VG33E for the 10% increase in displacment, and drop it in. But there is no point in turbocharging your Xterra. You could give me your VG33E so I could make good use of it in my Z.