For me, there is a benefit to doing it. I would rather get the original lifters out of the motor than to take the chance for one to fail, wipe out the cam and send the rest of the short block into oblivion. I would spend the money on the Johnson Lifters and be done with it and get the cam in while I am at it along with some port work on the cylinder heads. Things are different for me though because this is what I have done for a living for 20 years. I put a set of the Johnson lifters in mine 2 days ago and its the quietest this motor has ever been. I also did some work on the oil pump since it was off and I was swapping the cam again.