tach w/ shift light

so after goin to the track today me and a few buddies of mine that went decided we are goin every weekend. the one thing that would have come in handy today besides more power and driving ability, would have been a big tach and shift light so i didnt have to try to see under my hand and the steering wheel. whats a good basic setup with just the tach and shift light. and easy to hook up and adjust where the shift light comes on.
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