You can stop searching for a factory tach cluster for your 1964-66 c10. The retro hd series offers the vintage look you want with modern capabilities you need. Boasting a 2.4" Tft message center on the left, you can add just about any additional information you like, while the analog tachometer on the right lets you keep an eye on the revs. A small display in the center contains a simulated tumbler odometer. System requires stock or reproduction bezel for installation, not supplied. Does not fit GMC. The retro hd series is focused on retaining that stock look without sacrificing the late-model features you love. Every effort has been put forth to incorporate oem design elements regarding the layout, face styling and indicators. A casual glance may dismiss these as original equipment, but once you hit the switch and the led backlighting comes on in your favorite color scheme, all doubts will be removed.