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I want better gas mileage and i also want a manual trans. (i have a C4) a friend of mine told me it might be cheaper to buy a rebuilt 4-speed and swap out the 4th gear and put in a 5th gear to get better gas mileage on the freeway as opposed to finding a rebuilt T-5. does anyone know if this is possible and if so how much it would cost?
1968 Mustang Coupe - Daily driver
289, holley 600 carb, holley street dominator intake, petronix ignition, Accel Super Stock Coil, Tri-Y Headers, 2 1/4" 2 chamber Flowmasters, C4 and 2.79 rearend
1968 Mustang Coupe - Daily driver
289, holley 600 carb, holley street dominator intake, petronix ignition, Accel Super Stock Coil, Tri-Y Headers, 2 1/4" 2 chamber Flowmasters, C4 and 2.79 rearend