Review on COMP Cams 7702-1 Hi-Tech Pushrod Length Checker 6.800"-7.800" Range by Tim Burns

This presser length tester works like any other. Jam nuts can interfere with your measurements if they interfere, but other than that it worked great for me. I now have a version without lock nuts, but I would still use it again without hesitation. For those who say their shim is bent, do not use regular valve springs when cranking the engine with this shim on. It is not as strong as the .080-.135 wall shifter. Use a set of adjuster springs for applications where you want to check rocker arm span, or if using dual valve springs just use an internal spring. This pushrod control is not rated for more than 400 pounds of spring pressure.