I have standard gauges in my 70 challenger, can't quite bring myself to spend 200 bucks on one that will fit in my cluster, but i'm looking for a period correct look..any ideas? What about an old "knee knocker" tach avail from the dealerships back in the day..extreme accuracy is not a high concern, i'll be hiding a shift light under the dash just causei'll prolly have the 340 windin at the track this summer