That is gonna be fun! I had one in the same shape, I got an easy out from NAPA, the square tapered one and used the one that was just short of falling in the plug, tapped it in with a hammer, (into the stripped part of the plug) then I got a handheld torch and heated the area around the plug trying to avoid heating the plug directly, and with a little time it came out, no damage to the housing or threads in the housing. GOOD LUCK!