I'm working in a 1952 house and the studs used then are apparently 3 5/8" thick instead of the studs today at 3 1/2". I know it's really close so I'm wondering if I fill in door ways along a wall to make it into a longer hallway, will the difference be obvious when you cover the old and new studs with drywall? If so, what options other than tearing down and rebuilding the whole wall might there be?
You either go with different thickness of drywall or just shim the drywall out. I shimmed out drywall in a similar situation and it is really easy if there is such a small difference in widths. I really spent no time on this and had a 6 foot section 1/4 inch off.
Note: for 1/8th inch you only need to shim out the first smaller stud.