Lunati 60403 street ability?

I dropped my heads off at the machine shop yesterday and the machinist/owner and I had a long talk and he did a lot of checking on the heads while I was there. He looked up the specs for the Lunati 60403 cam I bought and told me that they are full of it on running so much spring pressure for mostly street driven cars. Drag car fine, but not street. He said that he has been round and round with Lunati and Comp cams about bumping their spring pressures up so high. These heads have had the spring pockets milled for different springs I had in the past and he is going to have to shim the springs a little but he is going to keep the seat pressure down at 90 lbs. He said since this is a street car he is looking at the fact that the lifters are hydraulic and their spring pressure recommendations would be rough on the lifters at low RPM's ( especially idle ) and cam life.