Hey Kris,
The gauge is a Koso speedo/tach/everything with a 6 bar LED fuel gauge. You have a choice of resistance ranges to use, depending on what your fuel level sender does. IIRC, there are 100, 250, 510, and 1200 ohm ranges.
The oil temp sender is a 0-300 degree unit.
My thought was to connect everything up and try the different resistance ranges until I find the one that puts the LEDs in the most useful range.
Hopefully I won't be seeing 300F, so it'd be nice if the gag maxed out at less than that.
I guess I could throw the sender in a pot of boiling water with a meter attached, and monitor the water temp with my IR meter and take lots of notes.
Or I could just put it on and try the different resistance ranges.