I agree with Sum Fun. I talked to Dema about the cam requirements for the 321 GMC I'm building and was very impressed with the personal response I received. I mailed the blank cam, 12 used and 12 new lifters to him this morning. He'll not only grind the cam but will test the lifters for hardness and make sure they have the correct radius on the contact surface.
I do all the dyno testing and tuning at a local performance machine shop and have access to several cam companies. I'm sure I'll use him a lot in the future.
Ron