THIS IS AN OLDSMOBILE 472/496 LIFT CAMSHAFT AND LIFTERS SET . THIS CAM AND LIFTER KIT IS A UPGRADE FROM STOCK /STREET CAMSHAFT . MY PERSONAL OPINION OF THIS CAMSHAFT IS THAT IF YOU ARE LOOKING FOR SOME POWER WITHOUT A REAL AGGRESSIVE LOPE THIS IS YOUR CAM . THIS CAM DOES MAKE AS MUCH POWER AS THE W/30 , W/31 CAMS . SOME PEOPLE WOULD CALL THIS CAM A MOTORHOME CAMSHAFT WITH GOOD TORQUE . IF YOU WANT POWER WITH A NICE MORE TO THE SMOOTH SIDE IDLE THIS IS YOUR CAM . ALSO THIS CAMSHAFT MAKES PLENTY OF VACUUM .  IT WILL WORK WITH STOCK ROCKERS AND STOCK SPRINGS .IT IS A 39 DEGREE AND WILL NOT WORK IN A 45 DEGREE BLOCKS .THIS CAMSHAFT WILL ALSO WORK WITH MY TOP-END AND ALUMINUM HEAD KITS .. I HAVE TAKEN A CLOSE UP PICTURE OR THE SPECS OF THE CAMSHAFT IN THE PICTURE DESCRIPTION