I have a 62 Fairlane with a 302 and C4 transmission, shifted through the floor. Car was originally a 3 spd manual and still has the clutch pedal. I'm wanting better highway manners and would like to replace the C4 with a 5 or 6 speed manual. The TKX is smaller, cheaper, and should require less cutting to the trans tunnel, however, I think I'd really enjoy the 6spd. more. So,,,,,,,,,,,,,,,,