The crank bolts for a Chevy 350 engine will be 5/8 inches in length. These bolts are only going to cost a few dollars for a set of them. Since this is an older engine You're likely not going to be able to purchase this at a big box store or a smaller auto part store. It might be best to just order it online.
James Jenkins
November 2, 2022
What is the threads to clean the crank shift
Jason K
July 30, 2020
The crank bolt on a Chevy 350 is 5/8 in.
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