A few 'Gizmos' must be added here.
The 1966 Mercury Cyclone GT '390' will come thru with;
* 3.90 Gears {Available option}
* 'Limited-Slip' Differential
* Close-Ratio 'Top-Loader' ... 2.32 ~ 1.69 ~ 1.29 ~ 1.00
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The Road Runner will be equipped with;
* 3.55 Gears {The 'typical' standard 4-Speed - 'Option' choice}
* 'Sure-Grip'
* 4-Speed .... 2.65 ~ 1.93 ~ 1.34 ~ 1.00
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Shipping WeightsB]
Mercury Cyclone GT '390' ...................... #3313 lbs.
Plymouth Road Runner '383' {Coupe} ..... #3424 lbs.