Removing Ignition Lock Barrel (Help)

[andys]

Hi i need to replace my ignition barrel, iv had a look this http://www.specialpatrolgroup.co.uk/spooky/barrel/barrel.html" onclick="window.open(this.href);return false;
But this is for 71 to early 74 bay( as The Old Volks home web site states ) and as my van is a 69 what will be different and how do I remove my one?

Thanks
Andy