HELP- 87 Trooper ignition
 

Trying to disable steering lock on my 87 Trooper, I have removed the ignition switch from back of tumbler, I have the key in the switch, but can't turn key. I am pretty sure it"s the steering lock thats binding, and not the tumbler, I tried pressing release pin on bottom of tumbler, but can't get it to budge ! Any help would be great ! Bill