IF YOU DO HAVE TO REPLACE THE LIFTERS BECAUSE YOU CAN,T GET THEM TO QUITEN DOWN ,NO YOU DO NOT HAVE TO REPLACE THE CAM, AS THE CAMS NEVER TOUCH THE LIFTERS AS THEY DO IN A PUSH ROD ENG ,THE LIFTER,S SIT RIGHT ON TOP OF THE VLV STEMS IN THE END OF THE ROCKER ARMS, AS IN THE CASE OF YOUR ENG , THE CAM LOBES ARE NOT GROUND ON A TAPER AS IN A PUSH ROD ENG SO THEY DO NOT HAVE TO MAKE THE PUSH ROD AND OR THE LIFTER ROTATE , SO THE LOBES ARE GROUND FLAT STRAIGHT ACROSS ,, JERRY