One more question...The recommended valve springs for the cam install @ 1.75 and coil bind @ 1.060 which means they coil bind @ .660 lift. This cam has a .477/.480 lift and if I use 1.6 rockers it should be .509/.512. Looks to me with everything set up properly I should have .148 to spare before coil bind with the 1.6 rockers. A tech at comp cams told me a while back that won't work. Why?