Well there could be a Proportioning and Braking Balance problem .. that you'll only find out by doing it Or when the MOT comes up.
Or testing on the road eg.. brakes lock up on one axle.
May be nothing, it may be perfect.. i don't know There may be a proportional brake valve balance thingy on models with disc brakes.
You'll find out Have a look through all the diagrams on this site to see if a device is there or not, compare disc and drum systems on mk 2 and mk3... with .. 4 drums , 2 drum 2 discs, look for difference .. devices/ restrictors/ valves fitted etc.
http://www.catcar.info/ford/?lang=en all the best.mark