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Small block mains

This is a discussion on Small block mains within the General Help forums, part of the LSx Technical Help Section category; Anybody know if a '91 Suburban (350ci) would have 2 or 4 bolt mains? I'm sure I'll have to look ...

  1. #1
    Member TexasLS1's Avatar
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    '72 Chevy C10 SWB

    Small block mains

    Anybody know if a '91 Suburban (350ci) would have 2 or 4 bolt mains? I'm sure I'll have to look at the block number to find out for sure. If it were to be 2-bolt, at around how much power would I need to add a stud girdle? Or should I just forget about using bolts and use studs/nuts? Forgive me, it's not an LS1!! Thanks for any help....

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    79 T/A -91 Firebird
    1998 Trans Am -Oynx Black

    Quote Originally Posted by TexasLS1 View Post
    Anybody know if a '91 Suburban (350ci) would have 2 or 4 bolt mains? I'm sure I'll have to look at the block number to find out for sure. If it were to be 2-bolt, at around how much power would I need to add a stud girdle? Or should I just forget about using bolts and use studs/nuts? Forgive me, it's not an LS1!! Thanks for any help....
    2 bolt

  3. #3
    Senior Member bigrondownhiller's Avatar
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    What are your plans for the engine?

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    Member TexasLS1's Avatar
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    Quote Originally Posted by bigrondownhiller View Post
    What are your plans for the engine?
    Nothing too drastic, but still want it to be respectable, probably around 400hp. All depends on money, though. I would like to put it in a '70 - '72 Camaro or '69 - '72 Pickup. I figure it would really have to be wild before requiring a girdle, but just got curious as to when it would be a must. Wish it was a 4 bolt.

    Or a 6 bolt LS1.

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    79 T/A -91 Firebird
    1998 Trans Am -Oynx Black

    2 bolt will be fine IMO

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    Senior Member bigrondownhiller's Avatar
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    The two bolt will be fine. If you want you can have the mains drilled for splayed caps as insurance.

  7. #7
    Member TexasLS1's Avatar
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    '72 Chevy C10 SWB

    Right on. Thanks guys.

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