I did the exact same swap (93 chevy,Automatic, 5.7 to 5.3L from 2002 silverado) mine is 4WD

some things needed

*crankshaft spacer
*motor mount adapters
*starter
*Alternator
*power steering pump
*custom y pipe with 2 o2 sensor bungs
*high pressure fuel pump (got mine from summit, edelbrock part #EDL-3581)(it's actually a walbro pump)
*wire
*relays
*custom PCM program

I would definately recommend getting a subscription to Alldata as I did (or something similar) for your 1993 and the vehicle the new engine came from. It will help a great deal with wiring.

I also learned a great deal from the people on this board (very knowledgable)