I need to replace the fuel sending unit in my Liberty CRD fuel tank. Any tips, or trucks?

Now would be a good time to replace it with an in tank fuel pump.

Are you sure that is the problem? They rarely fail.

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GDE FT Ecotune, EHM, Weeks kit stage 1 & 2, Carter 4600 lift pump, Upgraded tranny, Fishing boat hauler!
New at 164K: head gasket, rockers, exhaust valves, ARP head studs, Injectors, 5v Bosch glow plugs, water pump, timing everything, serpentine everything,
New at 225k: new head, timing belt

I assume it is the sending unit. The gauge works most of the time, but occasionally reads empty when it is not.

UPDATE: 12-20-2023
Dropped the tank. Opened up the fuel tank. Found the sending unit was in pieces, laying all over the bottom of the tank.
New sending unit works great.

Could be a ground issue. You aren't running any alternative fuels other than pump diesel are you?

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GDE FT Ecotune, EHM, Weeks kit stage 1 & 2, Carter 4600 lift pump, Upgraded tranny, Fishing boat hauler!
New at 164K: head gasket, rockers, exhaust valves, ARP head studs, Injectors, 5v Bosch glow plugs, water pump, timing everything, serpentine everything,
New at 225k: new head, timing belt

One time K1 kerosene was used in the tank

Haven't posted in ages but back when my son and I owned CRDs we both experienced erratic fuel gauge readings due to battery issues. Confirmed when installing a new battery fixed the erratic readings.

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Sold to LOST member my 05 Ltd, GDE Stg II turbo + TCM tune, SunCoast TC w. Transgo kit, Steiger window regulators, Samcos, Fumoto valve, 2nd gen filter head with Lub. Spec. bleeder, Hayden clutch & 11 blade fan, inverted spare, P-1 battery, BF Goodrich Long Trail TAs, Etecno1 glow plugs, timing belt at 50K miles/8 yrs

Hey old timer! What you been doing with yourself?

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GDE FT Ecotune, EHM, Weeks kit stage 1 & 2, Carter 4600 lift pump, Upgraded tranny, Fishing boat hauler!
New at 164K: head gasket, rockers, exhaust valves, ARP head studs, Injectors, 5v Bosch glow plugs, water pump, timing everything, serpentine everything,
New at 225k: new head, timing belt