Moroso 60460 Moroso Chevrolet Small Block/90 Degree V6 (w/Early Ribbed Style Timing Cover) Cam Stop Button KitMoroso 60460 Moroso Chevrolet Small Block 90 Degree V6 (w Early Ribbed Style Timing Cover) Cam Stop Button Kit Cam Stop Button and Retaining Plate, SBC and 90 V6 Chevy with early ribbed style timing cover, Cam bolts included Professional engine builders are familiar with camshaft "walk" when excessive end play produces erratic spark timing and the timing chain gear "eats" the timing cover Moroso solves the problem with a highly wear resistant button