What size bolts?
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  1. #1
    Official RnS Addict StueyT's Avatar
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    What size bolts?

    Hi All,

    I need some bolts so I can bolt the TH350 gearbox to a 305ci Chevy lump, I was told previously that the size should be 7/16" unc, I bought them and they are too big, any ideas what ishould have? It might just be the thread size is wrong but I'm not sure.

    Whilst I am at it what size do I need for the intake manifold? Standard manifold being fitted for the time being.

    Thanks in advance to all.

    Cheers,

    Stu.

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    Official RnS Addict 35kid's Avatar
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    if it is bellhousing bolts they are 3/8 UNC, manifold bolts are the same thread - 3/8 UNC. normally manifold bolts have a smaller head like the ones you get for headers because they are quite hard to get into on some manifolds
    Last edited by 35kid; 29-06-2009 at 16:09.

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    Official RnS Addict WB54's Avatar
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    Quote Originally Posted by 35kid View Post
    if it is bellhousing bolts they are 3/8 UNC, manifold bolts are the same thread - 3/8 UNC. normally manifold bolts have a smaller head like the ones you get for headers because they are quite hard to get into on some manifolds
    7/16 UNC are the ones for the gearbox tailshaft mount and 3/8UNC for bellhousing and intake, 12 point ARP ones are good as mentioned.

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  6. #4
    Official RnS Addict StueyT's Avatar
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    Cheers Guys, I will go out and get some some, I need to start cracking on with getting the engine and box mounted.

    Cheers,

    Stu.

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