February 17th, 2016, 02:38 AM
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Senior Member
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Join Date: Mar 2015
Location: mclouth kansas
Truck: 64 Gmc suburbann 305e, 4speed. v12 truck engine, v12 irrigation,2-305e,305a,305d
Age: 68
Posts: 373
Rep Power: 152
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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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