It won't be plug&play, but you can get by without a complete wiring change. It will be much easier if you have both FSM's, or prints of both their wiring schematics (check ACK's). Then it is just one page or wire at a time until you have covered ECM/TCM wires. The 98 fuel tank has a pressure sensor that the ECM wants to see, so you will need to run those wires also.
I have made up spread sheets with all the pins in one plug, and what plug & pin they go to, what color wires are on both ends (your swapped wires may be different) what voltage it should be and if power what key position it needs. Also what page in FSM I got information from. Grounds are very important, and easily over looked.
If you can't make up the spread sheet, or a complete diagram for each plug on the 98 ECM/TCM, then this swap may be more than you can handle. Try Low Range, or Hawk for a 16v swap wiring harness for the 93.