I have a simple question and can't seem to find a specific yes or no answer. I have a 1989 K2500 with a bad 700R4. I have a 1997 K2500 complete donor truck with Vortec 5.7 and 4L80E. Question, can I use the PCM from the '97 as a stand alone controller for the 4L80E? Modify the harness using only connections for the transmission? I am hoping someone smarter than me can help. It's my plow truck and old man winter will be making an appearance soon. Thanks!