Looks like your missing (mini stalling) while running along, in pic below 1 min into log you were running at 47 MPH and tapped throttle to 18.8% TPS. But instead of RPM's comming up they dropped, it went a bit lean, RPM's dropped, injecter pulse width increased, MAP went way up (lost vacuum) and caused you to enter low RPM/High MAP cells in main timing table that eventually dropped timing to 12*. The KS then picked up knock (could be the shaking engine) and dropped timing another 4.8* so you ended up at 8* timing. Throttle then stayed steady at 19% RPM started back up, MAP went back to normal, and 3 seconds later,the event was over. Could be ignition, fuel starvation related hard to tell. Although you are running a bit lean nothing on the log indicates bad sensors or dramatic problems. Unfortunately the OBD1 does not monitor HV ignition/wires/plugs or fuel pressure. Your LT BLMs show a lean overall condition they are pretty high in the 140's at times, but the ST BLM's (actual reading) show the PCM is correcting, not perfectly 128-135's but it's doing as best it can.