AS RICHARD [POSTED YOU WILL LOOSE A LITLE BIT OF POWER , WE HAVE DONE TWO OR THREE THESE IN THE PAST, IN 88 TROOPERS , WHAT YOU NEED TO DO IS USE THE COMPLETE 2.6 INTAKE MANIFOLD SYSTEM, AND THE 2.6 DIST AND THE WIRING HARNESS FROM THE 2.6 ENG OVER TO THE 2.3 THEN USE THE 2.6 EX MANIFOLD ON THE 2.3 HEAD, BUT DONT SWAP THE HEADS LIKE THAT OR IT WILL BE A DEAD FEELING ENG. THE ECM WILL CORRECT THE FUEL FLOW WITHING 2 MIN OF RUN TIME AND IT WILL RUN JUST FINE , ESP WITH A 5 SPD, AN AUTO WILL BE A BIT LAZIER , THERE WAS A 10 HP DIFF IN THE 2.3 INJ ENG AND THE 2.6, THE 2.3 SEEMS TO REV QUICKER THAN THE 2.6 BUT DONT EXPECT ANY MILAGE GAINS, IT JUST WONT HAPPEN. ONCE YOU GET THE ENG IN YOU CANNOT TELL IT EXT, FROM A 2.6,JERRY