 I had a '97 f-150 4.6 ran great but 
traded it in for  a '03 f-150 5.4 
because the '97 had 210,000 miles. 
The '97 never had major problems. 
The '03 I have pretty much sucks. Motor 
knocks on a cold start, tranny shifts 
funny, and the rear diff "grabs" when 
making a sharpe turn. Needless to say 
the '03 is for sale.