When adjusting hydraulic flat-tappet or hydraulic-roller lifters for proper preload on a 350 small-block, a 454 big-block, and other displacements and engine makes with non-positive-stop stud-mounted ...

Be careful when purchasing new plastic lifter guides for GM’s LS engines. It’s always a smart practice to replace the lifter guides when rebuilding an older LS engine as the material can become weak ...