Does anyone know the thread size for the hole on the front crank of a 350?

Im sure

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3/8x24 or 7/16x20 I think.

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@AlexJohnson Rock on, thank you

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7/16-20. 2 1/4 long

Please use a 3" bolt to pull the damper in partway don’t bottom it out hard in the crank. Then change to the proper length to do the final amount of pull in.

The proper final torque with the damper and the crank pulley installed is 60 foot pounds

The 3 bolts holding the crank pulley tothe damper is 35 foot pounds

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Perfect, thank you so much

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I like the kits that come with a tall-headed bolt…

Spectre Performance Performance Harmonic Balancer Bolt Kit 4699 is less than 10 bucks at most parts stores…

the summit version is even less money. Link