Oldsmobile Shaft Mount Aluminum Roller Rockers 330,350,403,400,425,455

THESE ARE TRUE 1.6 RATIO OLDSMOBILE SHAFT MOUNT ROCKERS . THESE ALUMINUM ROCKERS ARE DESIGNED TO FIT ALUMINUM HEADS OR CAST IRON HEADS DRILLED OUT TO EXCEPT 7/16 STUDS . THESE ROCKERS CAN TAKE FROM 450 LIFT TO UP TO 750 LIFT . THEY ARE ALSO ALREADY CLEARANCED FOR LARGER SPRINGS AND 3/8 PUSHRODS WITH CAMSHAFTS THAT HAVE LARGELIFTS . THEY ARE ADJUSTED FROM THE TOP NOT THE CENTER OF THE ROCKER FOR THE MOST ADEQUATE ADJUSTMENT . THEY REGUIRE NO GUIDE PLATES BECAUSE THE ADJUSTABLE CENTER SHAFT THAT SELF ALIGN THEMSELVES AND ARE LOCKED DOWN WITH 7/16 STUDS . THEY COME COMPLETE WITH EVERYTHING YOU SEE IN THE PICTURE .