Take a look at this set that I recently pulled from a '66 Chevy C10. They looked and worked great, however I am a purist and desire the look of the factory dash gauge cluster with a factory tach.

Autometer Gauges with No Limit Face and a Factory Bezel

I feel the aftermarket units are superior in quality and performance, however I prefer the look of factory original equipment.

Factory Dash Gauge Cluster with Factory Tach