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Old 01-17-2011, 06:48 PM   #1
Stew64
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Dumb question of the day

Are Chevy 3 speed and 4 speed bell housings the same?
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Old 01-17-2011, 07:23 PM   #2
jbgroby
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Re: Dumb question of the day

I know for sure they are on a 305 V-6 becasue I had a SM-320 (3 sp) and upgraded to an SM -420 (4 sp). Each had 4 main bolt holes that hold the Trans against the housing. I can't speak for others.

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Old 01-17-2011, 07:33 PM   #3
Stew64
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Re: Dumb question of the day

I'm looking to swap out a 3 speed on the tree for a saginaw 4 speed and merry it to a sbc
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Old 01-17-2011, 07:37 PM   #4
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Re: Dumb question of the day

The bellhousing that originally came with my '63 (230, 3spd) is currently in use with my 327 and M-21 4 speed, if that helps.
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Old 01-17-2011, 07:39 PM   #5
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Re: Dumb question of the day

yes the are the same, unless you find a bell that is designed for a 12 inch clutch,[think big truck] then the center hole is slightly bigger.
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Old 01-17-2011, 07:50 PM   #6
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Re: Dumb question of the day

Thanks everyone
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