Of these three PCM's which is the preferred unit for upgrades and what are the pros/cons for each? Are there any benefits or pros/cons to changing to a 7427 since I already have my 8625 connected and functioning in my S10. I realize these 3 all run at 8192-baud and are faster than the first gen 160-baud ECMs.

I still have my 8625 connected to the installed harness via a self-made ECM-to-PCM adapter. My main reason for making the ECM-to-PCM adapter was for insurance; I didn't want to get stranded on the highway. At the time I began all of this, I wasn't familiar with the limp home mode being built into the computers. I ask this question just in case a new person is thinking of having this kind of assurances available as they contemplate upgrading to a PCM.