Keith - There is a series of SAC articles in the DGJ Autumn 2005 through Spring 2007 that are very informative.

Jeff - I have a 1902 vintage SAC Grade 1 (second from bottom of the line) with POW grip. For comparison, it has 30" (honed)New Twist barrels, weighs 7 lb, balances 15/16" in front of the hinge pin, LOP of 14" and DAH of 2 7/8". I calculated the MOI to be 1.52. I find it a wonderful gun to carry afield.

P.S. Yes the gun you're considering needs some work but if it were me I'd grab it.