i bought a Dakota Digital 3.5" gauge with fuel level, volts, oil temp, water temp. it has a certain ohms it runs on i dont remember but i bought a sending unit from Black Rhino that is a match and it has no float to worry about. they both need adjusted to be accurate.
but i had the R1 service manual out yesterday and seen the ohm ratings on the stock unit and i might be able to use it too.
so basically i have not solid info for you right now untill i get home.