[omodified]

Behind the scenes, I actually mocked up everything on the engine. When I did, I discovered that the A/C compressor could not be installed after the water pump manifold. When I tried, I couldn't install the outer mounting bolt because the valve cover was in the way. So, I was forced to install it onto the manifold prior to mounting it to the motor. Once the manifold was on the engine block, I was able to torque the A/C compressor and the water pump manifold to proper spec.

GM 12630223 gaskets