Here is a link to a car that I came across that has something that I havn't seen before. It appears to be some kind of cable accuated shifter for the ZF 5 speed. I wonder if the shifting would be faster as you still need to use the clutch.
AutoTrader Classics - 1966 Ford GT40-Replica Coupe Silver 8 Cylinder Manual Other | Exotics | Emeryville, CA
AutoTrader Classics - 1966 Ford GT40-Replica Coupe Silver 8 Cylinder Manual Other | Exotics | Emeryville, CA