There are rev counters that have a coil signal spilter which transforms the signal from a coil pack to a single pulse instead of the double. They can be found in "other" cars.

You will need to mod them to work with our rev counters. (For sierra,saff etc..)

For a FWD escort, fiesta etc.. all you need is the rev counter from a car that was running coil pack from std (EFi Orion, xr3i, Etc..) so easy to sort for our cars You could use the same signal splitter as mentioned above but is cost effective to just change the rev counter for one with coil pack as the signal splitter requires you to buy the whole clock assembly from a breakers and the car they come on makes the clocks expensive.

Regards
Jano