t 56

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    69 Coupe T56 Conversion

    I have a 69 coupe 351 w and a 4 speed top loader rear end geared at 3.89.1 and the 4 speed is killing me on the highway im wanting to swap out the transmission but im torn between the tko 600 and the t 56 id rather the t 56 because I wanna drive it on the highway and want the 2 overdrive gears...