[ThirdCoastStroker]

look at the degas bottle on that fx4 its wicked low...i would look at the green one personally if they dont want an arm and a leg...i bought my 08 in sig below for 28k with 55k miles on it king ranch loaded nav, sunroof the works about 6 months ago

 

[ThirdCoastStroker]

The coolant resevoir or overflow bottle

 

[ThirdCoastStroker]

6.4 w/ low coolant....and NO LEAKS!!!
not likely, it seems like 90% of the 08's had radiator leaks!!!
i know mine did when i got it

 

[ThirdCoastStroker]

the green one looks like its saggin alot more because it is a 350 lwb....look at mine stock in the sig below before i put my leveling kit on, mines a 350