I'll second Jays concern about the crank heat treat....as well as the inner bore of the damper.
It's too bad but that inner bore must be checked prior to installation because many of these parts are NOT correct right out of the box.....and it stinks.

Its a DSC spacer and a ATI damper both were in use on the prior Ford crank and fit well.

Some questions for you;
1) By number, how many threads were pulled out?

I don't remember, all but 3 or 4 is my recollection, at least that the bolt could get to.

2) How much force was used to seat the damper?....assuming it was seated in the process of pulling the threads out.

Too much apparently, but it did not seem too bad - i used a ratchet and not an impact

3) Were the threads of the rental tool in good condition prior to using the tool?

To the best of my recollection. it seemed to thread in fine.

4) Are you certain the damaged threads are from the crank hole and not from the rental tool?....In other words, did you look into the crank hole to verify those threads are damaged?
I say this last part because I have had rental tools fail and my first reaction was....Oh crap, my stuff is damaged, when in fact, nothing of mine was damaged in the least...the tool had failed.

Oh yeah

Quote from: pbf777 on June 20, 2023, 07:27:49 PM

Quote from: DuckRyder on June 17, 2023, 08:54:24 PM

I must have gotten a friday afternoon crankshaft.

     That may be so, but is this the Ford O.E. soft cast iron crankshaft, that perhaps someone previously may have just abused the treads of?    As if this is, particularly one of the "import" steel examples, I might start to get nervous as I have found some of these that definitely exhibited over heat-treated treading surfaces to the point of being brittle, and if so may prove quite the task to repair.   

It's a Scat Stroker. It also had an out of round oil slinger

Quote

From my reading my 2 choices are tap it larger for a Hemi Bolt or helicoil. Either is going to require drilling it out, is there any solution to doing so with the crank it the engine and in the truck?

     I would not suggest going to the larger "Hemi Bolt" as that would require a larger diameter drilling process which would increase the likelihood for failure in the endeavor; yes the Heli-Coil process also does require drilling, but the sum is greatly relegated to just the removal of the original treading (which you imply is already greatly missing!  ) therefore the drill does tend to a great degree to self-pilot, and only with a rather deft touch can one really F.U.!   

     As far as in the truck, with the Heli-Coil process, if one can make enough room to work, then I surely wouldn't hesitate.   ;  though yeah, still dread the thought of having to do it!   

Good Point

     Scott.