350 Engine Bracket Bolt Size?

Discussion in 'The Garage' started by Joe Kitzmiller, Mar 30, 2006.

  1. Joe Kitzmiller

    Joe Kitzmiller Registered Member

    Dec 20, 2004
    Likes Received:
    West Virginia
    What size (length, thread, diameter) bolt is needed for the engine mounting bracket on a 76' GM 350 block ? To make a long story short, I work out of town and rebuild my blazer on the weekends so i didn't get to check on what size is needed. Would like to know, so I can pick up bolts at Fastenal before going back home.
    After next weekend it's been a little over a year since starting to restore my 73' k5 and almost everything mechanically will be rebuilt or brand new. Thanks - Joe.
    Last edited: Mar 31, 2006
  2. 1-ton

    1-ton 1/2 ton status Premium Member

    Apr 17, 2004
    Likes Received:
    Las Vegas, Nevada
    There are a lot of brackets on a chevy engine. I would say the most common bolt size for a bracket that bolts to the engine block would be a 3/8'x 1" course thread. Some accessories (like altenator P/S pump) use a metric bolt to bolt them to the bracket itself.

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