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Transmissions and Rear Ends Three on the tree or four in the floor? Shift it all here.

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  #1  
Old February 17th, 2016, 02:38 AM
bobdylan bobdylan is offline
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Default Bell housing question

I have a truck that has the sm318 3sp. I am thinking obout changing to sm420, is it a different bell housing? And will I need to change drive shaft. I quess I would need taller transmitton hump? Bob
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Old February 17th, 2016, 03:06 AM
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Default Re: Bell housing question

From the Jolly Site;

http://6066gmcguy.com/3-to-4-speed.html
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Old February 20th, 2016, 01:53 PM
bobdylan bobdylan is offline
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Default Re: Bell housing question

Thanks for the link
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