I am trying to degree the cam in my street 355. The cam is supposed to be installed at 106. I can either get 104.5 or 108. Since this is a 4 speed street car with 4.10 gears, I am thinking I could leave it at 108 and it would be fine. How drastic is the powerband shift for retarding the cam 2 degrees from recommended? I haven't installed a cam retarded before so I was just wondering.