I'm guessing it won't work but I wanted to ask the experts first. Please let me know if it's possible... thanks in advance!

 

People have gone the other way around; 04-05 on an AP1. As far as I know the only difference is pulley size. An AP1 with AP2 SC kit will run about 7psi instead of 5psi. I'm guessing if you did it you'd be lookin at 3-4psi until you got an AP2 pulley, which is like $135ish from Comptech.

 

Thanks for your help!

 

As stated above, if you go to a smaller pulley, it should work.