Well, other than that it once overran the runway in North Carolina with 96 people on board, I can't tell you much. :-)
http://books.google.com/books/about/...d=Qb9QAAAAYAAJ
Actually, I see your plane was added to the registry about twenty years later, in 1993. Do you have any logbooks that might tell you how much total time the aircraft had? If the plane has several hundred hours, the builder probably had mitigated any CG issues to a reasonable extent.
In any case, the airframe is identical to that of ordinary Heavy Haulers....and, beyond a beef-up or two, probably extremely similar to that of a standard Avid Mark IV. The CG limits and reference points are probably the same. Check with the Avid user groups, someone can probably get you the numbers. After that, it's time to get some scales and see where the CG of your bird actually lies.
Ron Wanttaja