Not sure why you want to convert; the Delphi EFI setup is quite good and the fuel management systems currently available offer "self tuning" options that are very user friendly. The V&H FP3 flash tuner is also adequate for most mild motor configurations.
Short answer is no. Thunderheart offers a "stand alone" setup and Daytona Twin Tec also offers an ignition module IIRC.
IIRC, '04 softails were both carbed and EFI, so the first thing I would get would be the OEM Parts Manual and the OEM Service Manual. You can use all HD parts for the conversion, three basic parts are the ignition harness, ignition coil and ignition control module. There are a few ancillary parts like intake manifold, intake flanges, backing plate, etc. that are carb related which I am sure you are aware of. The ignition wiring harnesses for the carbed bikes is different from the EFI harness. If you use the harness for carbed bikes, the fuel sending unit and associated parts will work.
The below parts list is for converting a '03 touring model from EFI to carb so some of the parts are not needed to convert your softail.
1) 16315-99 top engine mount
1) 69123-92 horn mount
1) 61163-02 spacer
1) 3775 bolt ( maybe may be acquired locally )
2) 26995-86B intake manifold seals
1) 27002-89 seal, carb to manifold
1) 27412-99 carb (have seen takeoff carb,intake & enrichment cable on ebay $100 )
1) 29229-88C enrichment cable
1) 29313-95 gasket
1) 32435-02 wiring harness, ignition
1) 31655-99 ignition coil (have seen new takeoff ebay $40 )
1) 32478-99B ignition module ( DTT, Thunderheart also available )
1) 38723-99 retaining clip, MAP sensor
1) 68042-99 screw
2) 1004 clamps
1) 26574-99 vacuum hose
1) 61402-02 gasket, sending unit
1) 11323 o-ring, tank to tank adapter
1) 61338-02 fuel valve body
1) 62172-02 gasket, fuel valve
1) 62161-02 nut, fuel valve
1) 62170-02 filter, fuel valve
1) 62842-00 adapter, fuel valve to tank
1ft) fuel line ( may be acquired locally )
1ft) 62555-95 insulator ( 5/8 plastic loom cover, may be acquired locally)