It can be a bit short,depends where you go with the revs,it picks up quickly anyway so it doesn`t bother me.No idea of the ratio,bought the box from e bay and had Mike Papworth rebuild it.70 mph o/d 4th is about 2900 rpm,bit scary over 90mph as it needs a 4 wheel alignment.
The only issue i had was clutch geometry,i used a modified Vitesse flywheel and had to play with different bearing carriers to get it right,then it wore out the AP plate i was using in 10k miles,ended up with a paddle type and good so far.
Steve