1967-72 Chevy / GMC Truck Tachometer and Vacuum Gauge Conversion Master Cylinders and Kits 1947-55 Chevy GMC 1st Series 3100 3200 3600 3800 Truck 3/4"-36 Spline x 3/4" DD

3/4"-36 Spline x 3/4" DD Welded Coupler Assembly

they will also increase your performance

0 degrees of caster designed into the upper control arm to make the vehicle drive straight and true

When doing this conversion you will have relocated the upper shock mounts for optimal shock placement and functionality

1967-72 Chevy / GMC Truck Tachometer and Vacuum Gauge Conversion Master Cylinders and Kits 1947-55 Chevy GMC 1st Series 3100 3200 3600 3800 Truck 3/4"-36 Spline x 3/4" DDUpgrade your dash with our 1967 72 Chevy GMC Truck OEM Style Tach and a Vacuum gauge Conversion. Available with a factory 5000 rpm tach or you can upgrade to a 8000 rpm for just a few extra dollars. Don't forget to replace your dash bezel at the same time (sold seprately)