since you're going to the trouble of doing the stock from a blank, you can have custom length of pull, drop at heel, and cast off. so, since the length of pull train is driven by the trigger, and the trigger drives the lockplacement decision, decide the LoP ( and drop at heel) and inlet the lock, then you'll see where the barrel goes via the vent hole location, and everything will fall into place.
good luck!
msw