Are you putting this in your 2000 explorer? If so, you should retain all of the EFI parts and graft the V8 wiring and EEC to your truck. Fairly easy job. You need Helm manuals for your truck and the engine you got.
The reason for this is everything in your truck is setup for the EFI engine and EEC. For a carb, you will need all new gages, dig out the PATS system, and possibly have issues with the GEM module for left over systems. You will have no way to activate a speeometer, as it is electrically driven from the rear axle. Also, you will need to add a return line for the fuel system for a carb.
Face it, in a 2000MY vehicle, a carb has no place, unless it is an all out drag car that has been completely gutted and run in controlled temps, etc.. Aside from that, EFI is by far superior to carburetion.