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Original battery group size?

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Old 11-29-2011, 07:34 PM
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Original battery group size?

Hello, I have a 1991 Z28 with the 350 TPI. What size battery belongs in my car? When replacing the ground wire (which was bolted to the exauhst manifold), I found that the battery did not fit in the battery box. It currently has a group 78 which is to big. Looks like the more you dig the more you find.
Thanks!
Old 11-29-2011, 07:39 PM
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Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: Original battery group size?

group 75
Old 11-29-2011, 07:42 PM
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Re: Original battery group size?

Thank you. Do you also happen to know cranking amps required for this engine?
Old 11-29-2011, 07:45 PM
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Car: 1967 Camaro, 91 z28
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Re: Original battery group size?

630cca or higher
Old 11-29-2011, 07:51 PM
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Re: Original battery group size?

Thankyou very much! This should help with the starting problem and I won't have to worry about the battery falling out during sudden acceleration or braking
Old 11-30-2011, 01:55 PM
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Car: '02 T/A WS6, '91 T/A, '91 Camaro RS
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Axle/Gears: 4.10 10 bolt, 2.73 10 bolts
Re: Original battery group size?

Do you have a hold down bolt on the battery? Might be wrong but IIRC, they are close to if not the same width, 78 is just longer.
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