On or around Tue, 05 Oct 2004 21:22:02 +0100, Richard Savage enlightened us thusly:
I know sister's BF had trouble on a 3.9 with not enough airflow - he was towing a heavy trailer though as well. took the aircon rad out in the end, resulted in much more airflow and no overheating.
have to admit, overcooling is not something one normally associates with V8s.