Thread: 1979 Formula Firebird 6.6liter 17K mile survivor..
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Old 04-06-2015, 11:54 PM
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Default Re: 1979 Formula Firebird 6.6liter 17K mile survivor..
Olds 403 is 4.350 inch bore! Same deck as the 350. Sounds like a very "Trans Am" over square motor

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