simples
remove gear stick gaitor
find roll pin
hammer out roll pin
remove stick
place jack under gearbox mount
remove geabox mount
lower box down slowly
GET FRIEND TO WATCH ENGINE AGAINST BULKHEAD AND ENGINE MOUNTS AS THIS HAS BEEN KNOWN TO CAUSE ISSUES WITH BOTH
remove 1 bolt either side at the front
remove linkage
replace linkage
refit everything you've removed
with a bit of luck, it should take about 15 minutes, if you take a tea break