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05-29-2012 06:02 PM #1
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- Car Year, Make, Model: 55 chev
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Will a 366 flywheel work on a 454?
I have a tired 366 Chevy big block in one of my trucks. I have a fresh rebuilt 454 out of a motor home. I have heard that a 366 and 454 flywheel have the same weights on the flywheel and are inter changeable but no one I talk to is sure 100%. Lots of experience with 427's and 454's but not a lot with a 366. Trying to get out of buying a new flywheel.
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05-29-2012 06:56 PM #2
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No they are Not who ever told you that is way Wrong ..... the 454 is external all other BBC366.396.402.427. are internal. a 366 is a 10.200 tall deck block 427 with a very small bore and both are internal balancedLast edited by pat mccarthy; 05-29-2012 at 06:59 PM.
Irish Diplomacy ..the ability to tell someone to go to Hell ,,So that they will look forward to to the trip
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05-30-2012 09:24 AM #3
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Even better because I have a rebuilt 427 tall deck truck engine. Because of the false info given to me that the 366 was externally balanced with the same flywheel as the 454 I thought I couldn't use it with the flywheel that is in the truck. Thanks a lot for the correct information.
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05-30-2012 07:15 AM #4
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NAPA shows the 454 flexplate, jobber @ $49.87 and the flywheel @ $154.02.
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05-30-2012 09:39 AM #5
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The only other Chevy engine, that I'm aware of, that is externally balanced is the small block 400.Ken Thomas
NoT FaDe AwaY and the music didn't die
The simplest road is usually the last one sought
Wild Willie & AA/FA's The greatest show in drag racing
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05-30-2012 02:31 PM #6
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502 are to
Originally Posted by NTFDAY
Irish Diplomacy ..the ability to tell someone to go to Hell ,,So that they will look forward to to the trip
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05-30-2012 01:04 PM #7
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the 350 sb with one piece rear seal are external rear and internal front
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05-30-2012 02:29 PM #8
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yes ....But .....i was taking BBC and that what he was asking about not small blocks
yes i know a ll bout the 1/2 and 1/2 small and 400s blocks 
no sence getting the guy befuddled
Irish Diplomacy ..the ability to tell someone to go to Hell ,,So that they will look forward to to the trip
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The first model car I built was a 32 Ford roadster by Revell in the mid 50's.
How did you get hooked on cars?