Thanks for responding. I will be asking for some help shortly as I recently upgraded the 16144288 TBI ECM in my '92 4.3L S10 to a 16168625 TBI PCM out of a '93 4.3L Sierra. I decided to upgrade to a PCM since the 4.3L is semi-modified and would enable more turning. Because tuning is new to me, I wanted to be able to swap back to my stock ECM setup in the event I screwed up something when tuning. Thus, I made an adapter to do this.

At the moment, I have the adapter and 8625 installed but have a fuel issue. Once I get those issues resolved and embark on making the kinds of changes to the PCM, I will begin asking questions and seeking help.