Whitetail,
Couple of questions now that you are progressing along:
I think you mentioned elsewhere your inlet of the lock has the flash pan centered vertically and parallel to the bore. Do you know where the center of the pan sits in relation to the face of the breech plug? On pre-carve stocks, they may or may not be built for a specific lock. Also, if you removed wood to square up the breech, you may have moved the barrel back. The relationship of the center of the pan and the face of the breech plug is important, and depends on whether you intend to install a touch hole liner, or drill a touch hole, or make it a patent breech (unlikely). Most barrels you get have a 1/2 inch breech plug, but it is worth pulling it and measuring. If you have not determined this relationship yet, and especially if you have not inletted the tang, now is the time to fix any issues with it.
Also, hard to tell from the picture, but it looks like your barrel extends quite a ways past the end of the stock. Most full stock long rifles will have a nose cap (muzzle cap or whatever you want to call it) that ends quite close to the muzzle of the barrel. Like about 1/16th, 1/8th or 1/4 ish inch from the muzzle. Some even closer. Those nose caps are supported by the stock, as in, the stock is relieved and the nose cap is placed or formed around the relieved portion of the stock. They are also usually around 1" to 1 1/4 or 1 3/4 inches long (rough guess). Not usually more than that in order to look right.
What I'm doing a bad job of trying to say here, is that you have a bunch of barrel sticking out of the stock. It won't look right if you put a nose cap on the end of the fore-stock and let the barrel hang out in front of it. It also probably won't look right if you add a new piece of wood to support a 3+ inch long nose cap to get it to the end of the barrel.
Could you shorten the barrel? Yes. How long is it now?
Could you add a new piece of wood to extend the forestock and then put a normal size nose cap on it? Yes. It will likely show, but only on close look if you do it well.
Could you let the barrel hang out? Yes. And once you spend time looking at original rifles, you will kick yourself for doing that.
If my interpretation of the picture is wrong, disregard all that!
Cheers,
Norm