Fuel level sending units

hi fellas
just my 2 cents re the fuel senders had 3 new ones in my 68. f..... with that thing a dozen times ,still out by 3 gallons .Chrysler 73-9 ohms most aftermarket stuff 80 12 ohms .is that a big difference. there is a guy in newyork who will rebuild stock senders ,don,t know if that will make a diff.I think redfish has a good point re the stock gage every body replaces the sender does nothing for the gage .the subject re the fuel gages is not new but nobody has an answer .BUT WHAT ABOUT REDFISH.
:burnout: