I have a 1972 500L with a 650cc engine ,oil cooler, weber40, sports silencer and a few other internal mods. I have tested the heat on the manifold where it bends going into the silencer and noticed it measures around 300deg, has anyone fitted an electric fan onto the vents on the boot lid above the manifold to cool them down a little, I have at the moment got manifold wrap on the manifold.