I don't know how long my slant six Duster's damper / crank bolt has been missing.
Does anyone know if a v8 crank bolt will work such as the 2 1/4" Mopar Performance part? Or where to get the slant six bolt? I know that the damper is on there good - cause I just did a timing set and took it off and on. But I'd kinda like to make sure the damper stays on.

It probably never had a crank bolt, although you can add one if you like. The slant six dampers are designed to press fit on.

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"Mad Scientist" Matt Cramer
'66 Dart - turbocharged 225
My blog - Mad Scientist Matt's Lair

Thanks for the tip. I have a crank bolt on my other slant six car (Dart) and I think it had one when I bought it (used). The threads are the same as a v8 because the installer tool fits the same, but I didn't know how long a bolt I would need. I hadn't heard that they came without a crank bolt. I do know that it was a "son of a gun" to get off and on.