An electric fuel level sender is less than $40 (Tempo)
http://www.iboats.com/Sending_Units/...view_id.238171
Add about the same for a matching gauge and you don't have to worry about a dipstick.
http://www.iboats.com/2_Fuel_Level_G...view_id.131608
If you don't want to do an electric gauge setup, they even have a mechanical gauge that reads out at the tank.
http://www.iboats.com/Tempo_Mechanic...-view_id.21305