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Need bolt lengths for BB exhaust manifolds.
Does anyone have the bolt lengths for the stock cast iron exhaust manifolds for a big block? (w/o A/C) The ones on my C-30 are so rusted and rounded over. It is time to replace them. thanks
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Mine were 1 1/8 inches long stock, but I couldn't find them that length, so I used 1 1/4 with a washer under each one.
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I pulled one tonight when I got home. Mine was 1-1/4 and didn't use a washer. I measured the depth and it looks like it would be safe to almost 1-1/2. Atleast on the first bolt hole. Time to order an extra set of ARP BB intake bolts since they are the right size and length @ 3/8-16 x 1-1/4" for the exhaust manifolds too. Thanks TX.
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