Two things come to mind. Pushrod length will influence how close the pushrod comes to the back of the guide plate slot near the bolt. Not sure which way it goes but to long a short may be the issue. Sideways alignment of the rocker is not uncommon. Sometimes one of the holes that the stud goes through is bigger so you have wriggle room. Also instead of cutting and welding I have cut the middle of the guide plate 3/4 the way through and mounted them in a vise and bent them slightly like a boomerang (I'm from downunder lol). You don't need much to change the alignment. However depending on how hard they are, they can break. Then you have to weld.
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