FFV or E85 dodge trucks?

From : dan j s

Q: www.e85fuel.com lists the dodge 1500 4.7 l truck as compatible with ethanol fuel 85% ethanol. i went on the dodge website and it also shows the 5.7 hemi engine as e85 compatible however while pricing i am not sure which trucks have this option. anyone know how much more would this set me back thanks! .