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Old 09-23-2012, 01:08 AM   #1
joe1966
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Join Date: Dec 2011
Location: chico california
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Exclamation Need some help with the tranny

My buddy has a 1967 chevy c10 pickup and we just took out the old 3 speed and we are trying to replace it with the old sm420. 4 speed. and all the splines and everything else is the same. will the sm420 fit in the bellhousing of the old 3 speed? thanks
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Old 09-23-2012, 01:51 AM   #2
padresag
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Re: Need some help with the tranny

yes
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Old 09-23-2012, 01:55 AM   #3
joe1966
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Re: Need some help with the tranny

Thanks bud. I think its an sm465. Because it has reverse right and down not left and down. Will the sm465 fit in the same bellhousing to?
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Old 09-23-2012, 02:38 AM   #4
padresag
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Re: Need some help with the tranny

sm365 has a larger frt input shaft brg retainer. i believe that 1968 was the year that it was introduced. you have 3 options. use the 68 and up b/housing- take your current hsng ta a machine shop and have them enlarge the hole to accept it. use a sm420
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