John: you may have to contact Widener's directy for technical assistance or run this one past the gunnut69, the Moderator of the Gunsmithing Forum. Yugo barrels produced for the Yugoslavian M98 Mauser rifles, whether VZ24s, VZ2447s or 48s or VZ/CZ24/52 MAY have different threads. Some of those Yugo Mausers are the same size as the K98/M98 Mauser actions but others, like the M48 and M48A are a tad shorter and may be threaded differently. If they are the wrong threads for your rifle you should be able to swap without aa problem.
As for quality - the Yuog may well be one of the smoothest actions and best quality military Mausers ever produced.