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Re: 283 4 speed question?
If you have a stock rearend most likely you have 3.90 gears as only the overdrive transmissions had 4.11's.
I ran a 1957 Chevy car rearend with 3.55 gears and a 1963 Borge Warner T-10 with close ratio. My cam was a CompCam with a 268 duration. The truck ran great back in the late 70's.
I would run either 3.34 to 3.55 to get both performance and crusing.
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