Have you verified vacuum. Reading with a gauge. And once you start a engine it is best to reset the lash once good steady oil pressure is established. When running an adjustable rocker system. 2 ways to do it. One is a bit messy but. Gives good results. 1. Loosen set screws and start engine let it warm up enough to run on its own, then going fire order or bank to bank. Loosen each rocker until you hear slight ticking. Then reset to .030-.060 preload. Depending on which stud you have. Will determine. The amount in addition after going quite. 3/8-16. Means 16 threads per inch. You have to do the math to get the correct amount of turn. For which ever studs you have. Other is after engine warm stop go through fire order and be able to ensure you on base circle of cam when setting. Lash and preload. But the same amount applies. With engine running a vacuum gauge also helps to ensure your not holding a valve open. When adjusting
