Crank bolt to hold damper

Update;

I ran rethreading to the next size up (7/8) past my machinist as the first words out of my mouth. He agrees that would be best. Mostly because he and I both know this is not a low powered stock engine. A heli coil at this level isn‘t what he would do unless that is what I wanted to do, and I really don’t. As mentioned above by nm9.

So the crank will come out and he will do the job. As I’m not set up for this and have no plans (or room) to equip myself for such work. As usual, yet another delay.
But it it has to be right and at the crank is to important. Anyone ever see a balanced fly off at the track? Or street?
Uuuuuuugly......

FWIW/FYI This is my .030-360 6 pack engine. 10.7-1, [email protected] 1.6 rocker, .595 lift solid cam, 108 LSA, in @ 104, ported intake and heads, super comp headers @ 1-3/4.
4spd/4.10’s/26x10 tires.

Hoping for the best, I understand all too well about cold garages.

I’m not fairing so well these last few years in the cold. A career of outdoor work with metal, tools and midnights, I’m getting a bit worn thin.


Once the crank is done, when ever it gets taken out and done, then, I will return.......