Disable safety key release from shifter?

I'm looking to see how I can disable the feature that keeps my key in the ignition if the lever on the shifter is pushed down. I want to replace my shifter but I really dislike push button shifters. I was thinking about drilling a small hole and slipping a pin or something there to hold the lever down so I can shift from gear to gear. I need to know how to disable the feature that keeps my key locked in the ignition.

Please, can somebody help? I have seen a lot of awesome mods on here and I'm sure somebody has as much dislike for this feature as myself.
 
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