Rocker arm geometry problem

I always assemble my heads with the rockers to check the geometry and shim as needed BEFORE I ever bolt them to the block. You can even slide the valves in without the springs installed, then install the rockers and move the rockers through their travel to check the geometry. The pushrods are not even needed at this point of an engine build. After the heads, cam and lifters are installed, then you can figure out what push rod length you need to have the 1 to 2 threads showing.