hello. i hope im posting in the right area. just got an 85 ss montecarlo and gas gage doesnt show accurate gas amount. when full tank gage shows about 3/4. im just wonderung what my options may be to either fix problem or replace something on it. very new to this so just throwing it out there to hopefully learn something. i read other posts but didnt find anything relating. sorry if i misssed my asnwer already. thanks in advance.