Matt,
I had suspected all along that the LASAR was causing the problem, which finally turned out to be true. A fellow named Steve Carter at Unison was most helpful in getting everything right. His email is
steve.carter@ge.com, and his cell number is 904 616-7601. After checking that the timing gear was not off by one tooth, and rechecking the timing with a special LARAR timing device I purchased from Van's (found TDC off by 7.5 degrees), the performance still wasn't up to par. Although Steve Carter said that it was indeed rare that the LASAR control box itself could be defective, he shipped a new unit at no cost and we installed it and there was a dramatic increase in performance. Now, at 7,500 feet, I can cruise at 185 mph while buring 9.0 gal/hour.
So, the bottom line is that although the LASAR unit was the problem, Unisom stood behind it and got it fixed.
Phil