Crank bolt to hold damper

if it was originally tapped with a taper tap, you can finish the last threads in the bottom of the crank snout hole with a bottoming tap. Go slowly, use thread cutting oil, suggest you use a real tap handle not a crescent wrench to drive the tap. DO NOT BREAK THE TAP IN THE HOLE, or you'll have a lot more problems to deal with. I think you can find a longer bolt on line. You can shorten a too long bolt, or use some gr8 washers in conjunction with the extra thick oem washer to use the full depth of the newly tapped threads, just don't bottom it out again.