What you are talking about is a mixed bag of terms that leave us with a rather fuzzy picture of what you're trying to do.

If you are bashing out a model and the wing position is flexible at this point then moving the wing forward will help the balance to go to the right spot both by making the tail longer and heavier, the nose shorter and lighter and moving the wing forward to place it over the proper balance point. For a 40 sized normal model shifting the wing forward about 1 to 1 1/2 inches should do the trick. But if the design is fixed at this opoint then making the horizontal larger will not allow you to fly with the balance point sa far forward. It'll just make it a trifle more tolerable but the model will still be a dog to fly. Mind you the horizontal will also be a bit heavier if it's bigger so it WOULD help but not as much as it sounds like you require. But at least you're just adding ballast in a disguised manner with this option.

A two inch shift on any conventional design of normal size is a LOT. Do not ignore that large a displacment. There is nothing wrong with ballasting the tail to get the balance point where it is supposed to be. To fly well any model must have the weight balance point located at the right place within about 5% of the chord length. Outside of that it's either a nose heavy dog or uncontrollable.

If this didn't answer your problem then some more details explaining what you have would be helpful.