before 11/1/69 use an adjustable non-positive stop rocker arm stud so a mechanical ... journals mechanical cam adjustable non-positive stop rocker arm studs stamped rocker ... arms and push rod guide plates the pistons ... 2v or 4v carburetor cast iron rail rocker arms are mounted on non-adjustable ... positive stop studs 1968-72 1973 and later 429/460 engines ... use pedestal-mount rocker arms as described for 351c engines on page ...
camshaft lobe lift coil bind may occur rocker arms and studs 429 boss fe engines and ... some 4-cylinder rocker arms are shaft-mounted while others are ... cams mechanical camshafts require rocker arm adjustment to set valve lash ... spring seat area this is a conventional rocker arm with closetolerance slot in head to ... guide push rods and maintain rocker arm alignment can be used with mechanical ... /2 standard 289 shown here is a rail rocker arm with loose-fit hole in cylinder ... head for push rods the u-shaped rocker arms maintain alignment can only be used ... 429-460 engines are similar the rocker arm is mounted on a slotted pedestal ... with hydraulic camshafts use a screw-in positive stop stud 1973 and later 429/460 have ... a modified valve train to convert rail rocker arm design for mechanical cam requires ...