I have recieved a BBc that when we tried to remove a head the bolt wouldn't come out of the hole , it was turning but not backing out , upon removing the water pump what do I find ?? a nut ! apparently some Bozo stripped ou the threads in the block and used a longer bolt and nut to hold the head on , now I want to repair this stripped outhole but don't want to screw up the locating dowel location will a Helicoil work in this situation ?? and NO I don't want to have to buy another block .