<< pfft. Ford and Chevy engines are just different brands of air pumps that operate on the same principles. They just put some of the bolts in different locations. (translation: you can make horsepower with either) >>
True, it just depends on the different costs to make each brand go fast. And which one grenades faster/the most.
<< I think 3.55 gears are the lowest Ford offers in the full size truck, my Expedition could use a nice 4.10 or so. >>
And you want to spin 5000RPM to go 70mph on the freeway? And get even worse gas mileage? 4:10s are nice, if you don't do any traveling or highway driving, but for all around use, 3:55 is great.
To the original poster:
Have you considered turbocharging? New turbochargers have nearly eliminated turbo lag, and the are a lot less parasitic that superchargers. I would think they would be $1000 or so cheaper too, and not $800.00 to rebuild. Both have their advantages.