Hi all, I want to get a little advice from others who might have done this. My Chevy 250 inline 6 had a threaded insert in the driver rear head bolt location. It was not a heli-coil but a steel insert. I pulled the head for some work and found it was sticking out some. Needless to say, it would not torque up to specs. I was able to remove it. The hole in the block is at 5/8" (head bolt is 1/2"). I was recommended to use E-Z Loc insert which requires a 3/4-10 threaded hole for the insert to be used for a 1/2" thread. So the question is, has anyone had any good luck with using any inserts for a head bolt location? If so, what did you use?