I am in the process of an engine rebuild and the engine builder calls to ask if I want the cam re-installed at 7 degree retarded. That sounds like a lot to me. The car made good power. I liked the curve. However, I wonder if it would perform better if installed per the cam card. The cam has 2 degrees ground in advance. The engine builder recommends installing it as directed. I don't know why the cam was installed 7 degrees retarded. I do know that it was supposedly installed dot to dot and they didn't degree it. What do you guys think?