Re: 68 Z28 alternator
You have 2 options. 1st and easiest way is to insert a Heli-Coil thread repair. Very strong and if done properly, hard to detect.
2nd option is to tig weld up the hole and retap. This is a lot tougher as these alternator cases are very porous castings. Again if done properly undetectable.
Hope this helps, Chris
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