I'm trying to figure out the pushrod length for my 351w 408ci stroker build and I'm running into a snag. My block has been decked to 9.482" and I am using AFR 205cc heads with Comp Cams Pro Magnum rockers and Comp Cams Endure-X roller lifters. The cam is a custom grind from Flowtech Induction and is a mechanical roller. I am trying to use the sharpie method to get the roller rocker centered on the valve stem. The only way I can get the rocker centered on the valve stem is if I extend my pushrod length checker all the way to 8.75" which is way too long and leaves no threads left on the rocker stud. Ed from flowtech induction told me, "As for the geometry, look for the "smallest" sweep over the valve and call it a day. You may not be able to get it perfectly centered over the valve but the less it swipes, the better." Has anyone else ran into this problem? Here are some pictures to help illustrate what I'm trying to say: