Not the best place for your tach. Looking down is never good when driving.
Your tach is designed to go around the steering column with a big hose clamp.
But with the column shifter that can be a problem.
Here is a idea for you I came up with. Take the second screw out of the instrument cluster,and save it.
You will need to find a bigger screw of the same diameter. Screw it in and your done. Actually works really well here. In perfect sight, without covering all your gauges. 8)