Texas TLH, Your 168s would be just fine for the Impala. Your other three animals are rather large critters, especially the Eland. Using 180 Gr. premium bullets i.e. Barnes TSX, Nosler Accubonds or Partitions on broadside shots will do the trick although they are far from optimal. Heavier bullets would be better, but by comparison have the trajectory of a rock. Of the 22 animals we took only the Wart Hogs were +/- 50 yards. Most shots were between 150 and 220 yards. Start practicing with shooting sticks, you will be expected to use them in Africa. You will be asked to identify which animal is highest on your list prior to departure. If you have a "minimum" size for that animal, make sure your PH knows it. Your best flight option is Delta from ATL to O R Tambo, If possible spend a few extra bucks on the Economy Comfort seats. Stay at the Afton House, They will pick you up at the airport, offer you a grilled steak dinner for $25.00 provide you with a comfortable room and a good breakfast the next morning. One or two PHs from Cruiser will be at the Afton House waiting for you. After supper you can relax at the small cocktail lounge the Afton House offers and chat with the PHs. This is a very good place to "break the ice." If you forgot anything (hunting related) ask them to stop at Safari & Outdoors on the way to the ranch. They stock everything you ever dreamed of and a lot more. One last thing, although not a requirement but a strong recommendation is to use riflepermits.com to help you clear your firearm(s) through SAPS. Believe me you will be glad you did.