I highly prefer to fly LOP, usually cruise 6500-9500', currently 30Hrs post OH, IO-360, finewire plugs ~100 Hrs, new harness at overhaul.  After breakin used my JPI data to swap around some injectors to get my GAMI spread back in line, and have it at 0.4-0.5 GPH spread, so quite happy with that.  Just took my first big trip with the plane post overhaul, but engine does not seem to be entirely happy running LOP despite the nice(low) GAMI spread...when I transition to running LOP, the engine just