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318 (Big Block) - 383 conversion

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Freshwater Fred
Advanced Member
Username: fred70

Post Number: 186
Registered: 01-2009


Posted on Thursday, October 01, 2009 - 10:19 am:   Edit Post Delete Post View Post/Check IP

318 (Big Block) - 383 conversion

If the old Poly 318's were big blocks, can I yank the engine out & use the same bell housing with 383/400 or a 440?

Fred 156-M
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Buehler Jet
Member
Username: bogdenz

Post Number: 71
Registered: 06-2009
Posted on Thursday, October 01, 2009 - 06:55 pm:   Edit Post Delete Post View Post/Check IP

Hey Fred - the old poly's were not big blocks. Poly's, or "A" engines are the small block predecessors of the "LA" engines.

Alghouth many/most components from the Poly 318's won't bolt up to the LA 318's, one of the things that actually does bolt up is the the bell housing.

Unfortunately, you'd need a big block bell if you go to the 383+.
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Buehler Jet
Member
Username: bogdenz

Post Number: 72
Registered: 06-2009
Posted on Thursday, October 01, 2009 - 07:28 pm:   Edit Post Delete Post View Post/Check IP

Fred - just to elaborate slightly on that last post, I should have added that you're not mistaken in your understanding that poly 318's were often referred to as "big blocks" or "wide blocks".....but that was based more on it's appearance than spec. It's really a misnomer that stuck around.

To that point, I didn't mean to imply that you were using the term "318 big block" in error.
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Freshwater Fred
Advanced Member
Username: fred70

Post Number: 187
Registered: 01-2009


Posted on Friday, October 02, 2009 - 10:58 am:   Edit Post Delete Post View Post/Check IP

thanks

Fred 156-M

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