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flexplate (flywheel) differences 305 - 350

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Old Jun 18, 2012 | 10:00 AM
  #1  
1991_RS's Avatar
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Joined: Feb 2011
Posts: 175
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From: West Michigan
Car: 1989 Formula Firebird
Engine: Swapped 350 TPI speed density
Transmission: 700R4
Axle/Gears: 2.73 (soon to be 3.42)
flexplate (flywheel) differences 305 - 350

Swapping from 1989 305 TBI to a 1991 350 TPI. Are the flexplates (flywheels) different? Visually, they have some differences, but is it necessary to swap them, too?
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Old Jun 18, 2012 | 10:20 AM
  #2  
Apeiron's Avatar
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Joined: Jan 2000
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Re: flexplate (flywheel) differences 305 - 350

They're interchangeable.
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Old Jun 18, 2012 | 10:47 AM
  #3  
1991_RS's Avatar
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Joined: Feb 2011
Posts: 175
Likes: 1
From: West Michigan
Car: 1989 Formula Firebird
Engine: Swapped 350 TPI speed density
Transmission: 700R4
Axle/Gears: 2.73 (soon to be 3.42)
Re: flexplate (flywheel) differences 305 - 350

Thank you! I was sweating the thought of having to split the trans & motor now that it's back in the car.
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