I used a lot of fords just like yours when I was Rodbusting. Bullet proof engines, but expect to replace, or rebuild the tranny at 100-150k miles, if your lucky. But to be fair we did haul a lot of men and wire which adds up when you got 800lbs of steal wire and another 1500lbs of rednecks and Mexicans in them all the time. We drove non stop and always used these trucks and it happened to them all. When we finally got the lariat's with the 5.4 we never had a problem, they all lasted to 200k then we traded them in for new trucks.