Heater hoses

The setup on rklein383's engine is totally different than a Magnum setup. MileHighDart has it right, since the Edelbrock Magnum intakes move the thermostat housing toward the right side and the AC compressor toward the left side, like factory Magnum positions. I am assuming you are also using a factory Magnum AC compressor and aluminum mounting bracket. Done correctly, it's a clean setup.