411A,
I've had really good all around experience operating A300 B4's for 8 years. By far most of the time was in pax config., but I did fly dedicated freighters too. The cabin volume allows full payload most times. I believe around 37 tons. The GE's are far better than Pratts, and as long as the aircraft have been well maintained you should have a profitable operation. Of course you are well aware of the shortish range, but if your operations are within 4 to 5 hours you should be alright.