Valve Lash Adjustment

Hydraulic roller or solid? If it's solid, then yes, they need to be checked often. For example, I worked with a guy who had a small block Chevy with a Comp Cam solid roller, approx .640" lift in a car that he drove daily. He checked the valve lash once a month. Solid rollers are unforgiving if you let the lash get too loose, even on a Mopar with it's superior shaft mounted rockers.