Some 360 magnum questions

There is a trick to aligning the manifold when installing. Use a threaded rod screwed into the heads, at least 2, which will bring head straight down. I don't remember thread size that you need for the rod and probably 4" long rod will do the trick. Maybe someone here knows what the thread size is or take a manifold bolt to Home Depot and match it up. This is only done with the vertical bolts on the manifold.