Plugging along on my 440 stroker. The block was zero decked, different lifters, 440 source heads, and the valves were sunk, so a few variables have changed in the valve train since stock. I also would like to keep the stock rocker arms and am using the method in this video to get the rockers to the correct geometry.. Basically, putting the rocker arm centerline 90 degrees to the valve stem. I estimated the rocker centerline by matching the radius of the rocker tip against a 5/8" bar stock and found that center then drew a line to the center of the shaft bore. I used a laser level to plot a parallel line to the top of the spring retainer. This would mean that I have to shim the shaft .250" to raise it. It seems like a lot. Maybe I have the centerline wrong.