I have a 2001 Ford F-150 (4.6L) extended cab with 110,000 on the Odometer. I would like to be able to tow my 1996 Chevy Impala SS show car (4500lb curb weight) on an 18ft trailer. I will be towing my Impala out of state (North Carolina), and I would like to know if I can safely do so with my small-engined F150. Are there any upgrades that I should consider on my F150 before attempting this task?