shouldnt be a problem at all
There shouldn't be any problems running AD-3 for 8 weeks.
Personally I might wait until the start of the second or third week on the DAA to start the AD-3 and then run 1-2 weeks past the end of the DAA as well. That gives you a total of 9-10 weeks on a sweet stack.
Ooops hvactech beat me to it lol!