from what i remember, if your happy running your machine with the lid off and more importantly, the drive bays removed, (which would be a shame as the A3000 is one of the better looking of the miggy range), then yes it would work.
from that, its my guess, its the simm slots that foul with the drive bays but i don't know if thats with or without simms installed. if its without simms, then its down to how happy you are desoldering 72 pin simm sockets.
i just remember the A3000D being rather tightly packet in there :-)