I want to find or build a close ratio C6 for my 66 F100 with a FE390. Truck will be used for commuting and driving around on weekends. No hauling or towing. The close ratio in first and second should provide quick acceleration in traffic and the 1 to 1 in third coupled with a 3.0 rear ratio and 265/75 R 15 inch tires should provide about 2500 rpm at 70 mph. I need advice on torque converter specifications and sources. And I am soliciting expertise and opinion from anyone on this forum.
William in Atlanta

 

>I want to find or build
>a close ratio C6 for
>my 66 F100 with a
>FE390. Truck will be
>used for commuting and driving
>around on weekends. No
>hauling or towing. The
>close ratio in first and
>second should provide quick acceleration
>in traffic and the 1
>to 1 in third coupled
>with a 3.0 rear ratio
>and 265/75 R 15 inch
>tires should provide about 2500
>rpm at 70 mph.
>I need advice on torque
>converter specifications and sources.
>And I am soliciting expertise
>and opinion from anyone on
>this forum.
>William in Atlanta

William, what you probably really want is a "wide ratio" C-6 if I'm reading your post right. The wide ratios offer better (faster) acceleration in first and second gear but retain an "economy" 1:1 ratio in high. As far as I know all C-6s are close ratio. Ford installed the wide ratio gear sets in the E4OD auto trannys. You can purchase that gear set from Ford or a SVO Ford Motorsports Dealer. It will run you around $400 for the kit and will fit in a C-6. As far as tourque converters are concerned it will depend on how much modifications have been done to your engine, truck weight, gear ratio, intended use, etc. Deen