well i went to put my engine in yesterday and i ran into an issue , one of the old plugs was stuborn and broke off , well in the process of getting the old plug out the electrode dropped into the cylinder , and it wound up between the piston and the flat spot on the head , so i pulled the head to remove the debris , there was quite a bit more there , so when i went to put the head on , i got new head bolts , the bolts would not fit in 3 of the holes , it just chewed up the bolt thread , somehow the hole got crassthreaded , have you guys ever heard of this happening , will a simple clean out with a tap fix the problem , i need help please.