There is a shield affixed to the front of the engine in a manner that wraps around the manifolds.
There is a boss on the cylinder head that is typically tapped for this application. Some are not.
An upper tang on the heat shield affixes using a SA504 cap screw.
Lower tang goes onto the first manifold stud. With this arrangement the shield stays in place.
Heat shield is painted semi-gloss black.
Heat shields for 6 and 8 cylinder engines are different
First engine is 8 cylinder and above is original 6 cylinder with heat shield in place.