hey guys. i am trying to figure out the harness conversion. what i got is a 98 obs 4.3 5spd thats getting a 99 5.3 out of a silverado. i do not know which route i have to go. can i just completely run the 5.3 harness and pcm or do i have to run both pcms. i have read on the forums now of people doing it both ways... if i can just go with one pcm, then that would be what i would want to do.