To those who have underdrive pulleys and an AOD, I would like to know if anyone is running a 2.5 inch alternator pulley instead of the 2.0 inch. Per the March Performance website, they recommend those with AOD to select their "power and amp series" version which differs in that it has the 2 inch alt pulley instead of the regular kit which includes a 2.5 inch. I have always owned 5spd manual mustangs, so my car with the AOD is a sorta new journey. The reason I just dont buy the recommended set, is because i am getting a full set which includes the 2.5 alt pulley, for free. I have never had any probs on my stick cars with U/D pulleys, but for the AOD guys, are you runnning the 2.5 alt pulley, and not experiancing any probs? Are you running the normal size and having serious charging probs? Thanks in advance for your help.