My last 4runner had a 3rz, 38 sx's, lockers, stock duals and w56. The second case had a 23 spline input. Enough power to get it done, but not enough to brake shit. I bagged on it for years, took it racing, clutched kicked it a million times, side stepped the clutch in 4low at red line multiple times. The beast just dead hooked and took off. I think one thing that saves parts, that most people over look, is the engine and trans mounts. I ran stock rubber mounts on the engine, and one on each case. Stiff enough to keep it where it needs to be, but enough give to soak up shock loads. Anyway, a 3rz makes more power NA than a turbo 22turd.