'70 GTO Steering Column Rebuild

[Mr70]

At the 2 O'clock position,there's a cast metal slot you have to break.Yours looks to already have been broken through.
Once you break through,you insert a tool,(I use hacksaw blade),and depress the slim spring loaded button while pulling on the ignition lock cylinder,and it will come out.

Watch this @ the 2:35 and 3:00 mark:

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