Make sure your A12 is built before you shoot any juice into it. As DD stated, a 25hp wet shot wont hurt anything but it must be wet. If your adding a supercharger, rethink what you are doing.
I ran a built A15 for a few years with both nitrous and a supercharger. I finally killed it a couple years ago. Put a rod through the block. Never had it dyno'd but the shot alone was 100hp. Now a days for me, I try to keep things more under control. Im boosting 5psi through a Z24 with a 50hp shot of wet NOS. The supercharger is the power. The NOS just adds a little xtra. Fuel pressure and timing all must come into play.
Do it right the first time or pay later.
A12 built supercharged with 25hp wet NOS is doable. Factor everything in.