Dan,
On the surface I probably wouldn't have had too much of an issue with brazing per se but this guy was something else. Not only did he leave big heat distortions in the tops of the fenders at every spot he brazed he chiseled off the front end and left the edges of the old front behind. That made the front too forward, the doors too forward and the quarter panels forward so when he put the decklid on it was overhanging the quarter panels by 1/4".
He also sliced through both rear inner wheel wells and most of the inner structure.