[Orange Crate]

Brake fluid is hygroscopic, meaning it attracts water, so if your truck has been sitting for a long time I am guessing it has water in the brake system, explaining why the light doesn't go out (proportioning valve stuck). The hydroboost system installed is a good system when it is installed correctly and in good shape (overhauled or new). Your hydroboost is installed "upside down" from normal stock installation but it doesn't matter to the hydroboost. Some people like the hoses pointing down and it doesn't affect the operation. I have attached a picture of the ports for you to check that the valve has the pressure and return hoses hooked up correctly. Remember that your system is "upside down" so these ports will be on the bottom, but it should be enough for you to trace them to their connection at the other end (pump pressure, steering gear and return).