Gents:
Some years ago I had a 72 Chevy 1/2 ton that we dropped a 468 big block into. The truck normally ran on the warm side, but in summer bumper to bumper traffic would overheat. We solved the problem by adding an electric pusher fan. The change was dramatic, when the fan kicked in you could watch the temperature gauge drop. Wired the fan so it would ron for a full minute after shutdown to help cool the engine down more quickly.
Never had a problem with any air turbulance [vortices] etc.
