When I was autocrossing the blue car every weekend, we made a simple lockout of 1/4" aluminum that simply pivoted on a longer upper left gate screw. Quick & easy, no hinge or drilling. As OEM, the gate chrome plating is MUCH harder than the shift stick steel so unless you dremel the gate slots very smooth, your shift-stick can be badly damaged. I've seen them break and replacements are very hard to find! I TIG-ed a significant depression in our stick with stainless steel weld. Once smoothed & buffed, the repair is almost invisible.
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