Question about diff. gear ratios

I have looked it up i have 4.10s in my TB with 17inch rims.
would i benifit from better fuel milage in town or highway if i were to go with the OEM stock setup?
price is not an issue
Joshua

EDIT: what is a 4.10 ratio best used for i guess is my question ,, i seem to remember a fleeting moment of my adolesence wishing i had 4.10's for my street rod. and 4.63's were what i had in my prostock dirt car.. help ,, help me please
Joshua

Most owners would kill for 4.10's. That is an OEM gear set. 3.42 are standard and 3.73's or 4.10's optional. 4.10 is the perfect range for the 4.2L IMO. Fit the largest diameter tire you can to keep the RPM's down if you wish.

Joel

thank you sir.

Joshua