Thread: Muncie in a 73 bird
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Old 05-30-2022, 10:14 PM
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The Muncie in the '73 Firebird series was both the M20 (wide ratio, 400 mostly) and M21 (close ratio, 455 mostly).
The Muncie in '74 was the M20 (wide ratio). If PHS states M21, it was the Borg Warner T10 (super or second design).
1970-4 factory Hurst shifter used the same parts, except the mounting plate changed.

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