Recently removed 60 series 5 speed gearbox from my 1200 ute (a14) and replaced it with (a14) sunny 4 speed.

Used throwout bearing from 5 speed on 4 speed box as bearing that came with the 4 speed was in bad condition.

Clutch used with 5 speed gearbox was left on the motor and was not touched or changed.

For some reason, no matter how we adjust the clucth cable, we cannot get a good clutch pedal or get it into any gear.

What could be causing this;
do the throwout bearings differ from 4 speed to 5 speed?
do the clutch forks differ from the 4 speed to 5 speed?
do the clutch and pressure plate differ from 4 speed to 5 speed?