360 j head valve stem diameter?

The problem arises when the rocker is at full lift, the pushrod will get a abnormal amount of pressure due to the spring rate and the deflection of the rocker arm, and try to push the pushrod through the intake side of the head. Also this puts a major strain on the adjuster and can cause them to fail. Useing the right pushrod is the best and only way to do this. I agree with 340mopar when useing the hyd. lifters and lash caps.