Sheeet, you guys is fancy. My ol' `77 has no heat shield, just a cast-iron appearing manifold that is always looking to rust.
From time to time I spritz on a light mist of aluminum engine paint. That covers the rust and looks great. For a while.
But does she need a heat shield? Or was that something only needed on the FI models with all their fancy plumbing?
As to heat damage, I just changed the center wire from my coil to the distributor. The others are still, if not quite original, at least in place for the 22 years I've owner her. Never had a problem with them.
About once a year I've gunked my cars motor after wrapping the sensitive parts in foil. But still I doubt her engine compartment would be chosen as a location for a fashion shoot.
-don