The takedown barrels are physically interchangeable with the solid frame barrels for rifles produced in Utica and Chicopee Falls. That does not mean it is a cakewalk. The replacement barrel may not index correctly, and if it does index, it may not headspace correctly. Changing the forearm stud is easy if the screw is not damaged or rusty, and the stud will be in the right location if both barrels were later than S/N 90,000. I've done it, and that is all I remember about the changes.
