Originally Posted by soaringhawk
Very valuable information from all. Wheelie, please forgive my lack of knowing. When you say "The older E-series Vans have a normal spark plugs, to which years does that apply?
Ford has had many variations of the 5.4 and the 6.8
my knowledge is only 5.4 based.
My response is only based on the Ford vans with the 5.4, later models with the 5.4....say after 07-08....I have NO idea which 5.4 version. so a google wiki search would be a good idea. as it will give you to much detail.
I love the detuned E-series 5.4.
Your key to knowing which Version is the 2-valve motor.
Late 90's through end of life for the E-series.
.........its a pooch on paper but does just fine for a van. Once you're use to how it works. It will satisfy anypone who's not pulling high altitude & loads regularly.
They get great mileage if use within reason.
The right gearing and real world mileage can see 16-17mpg @ 7,000LB @ 70mph.
75 mph can make those #'s drop drastically.
earlier Ford Vans had many options...most popular is the 5.8(351), the 460 Big Block.....1/2 tons had inline 300CI 6er.