Relocate. Buy it here, as this is the cheapest price for a quality relocate kit. I just got mine in and it's great quality.
And usually if the Fuel Temp sensor code is popped, the sensor is bad. Needs to be replaced. Verify the connector is free of corrosion, and if cleaning it doesn't help, then replace it.
As far as gurgling, that's most likely your coolant gurgling in the heater core. Burp the radiator. Park the car on an uphill grade (a steep-ish one,) and (with the radiator cold) open the radiator cap, and remove the bleed screw. warm the engine till the thermostat opens and coolant starts circulating. The level should drop. keep it topped off. Revving the engine helps circulate the coolant faster. Don't bounce it off the limiter, just a quick blip of the throttle.