So many say to modify a socket..when it's a depth and angle issue. Imo.
Most plug sockets are deep, some thicker.
The u joint style plug sockets from powerbuilt are thinner, shorter and have the u joint to get an extension around the header tube. It's the only one for me that works on all sb/bb. But grind a good socket down and maybe itll crack get stuck or break the porcelain...itll be a blast. Lol