273 rocker help

You will need the Crane pushrods if you are running a hydraulic cam only. As well I reccomend getting a adjustable bolt and nut set for the pushrod. Other good ideas are shims around the shafts to fill in gaps and to better center the rocker on top of the valve center. I've also read where you can plug weld the oiling hole on the top of the rocker and drill a hole approx 100 thou. on the underside of the rocker arm pointing to the valve stem top where the rocker makes contact with the valve. The good thing about adjustable rockers is the fact that you can vary the lifter pre- load. I preload my rockers at 3/4 of turn in from zero lash. I've been runing this set up for years with great results.