This is the guitar I am using atm

I always use the both pickups when I play cause I think it sounds better. Hovewer I would like to change them to the ABH-3 active blackouts. Do I need to change both the neck and bridge or could I just change the neck one? Also would it be cost-effective doing so or should I find a second hand one with those pickups already installed?
sweden on tour
you should just try to find a used set of blackouts on ebay or something and do both pickups at the same time.
What would happen if I use the backout at the neck position and the original duncan design at the bridge?
Would the sound just get bad or could I use one or the another based on which sound I want with the switch?
sweden on tour