I´m in the business of doing airport transfers here, this is a tight, but doable connection, and we suggest you get to AEP the fastest way you can, which would be to hire a reliable private chauffeured car service, who will be waiting for you with a sign right as you arrive. 4 hours is the bare minimum we suggest for this transfer, as your arriving flight may be delayed, immigration and customs can often take 90 minutes for morning arrivals, and if there is traffic, it can take 90 minutes for the transfer and AEP suggests that you arrive 90 minutes before a domestic flight.
Good Luck!
Fred