I think what you are experiencing is that you have nuts on the adjusters. You're going to need to measure how much tall the nuts are and add that much length to a new sec of custom pushrods, if you're going to keep the nuts. You're probably going to have to, because if those came from Gary at Rocker Arms Unlimited,like you say, the self locking feature on the threads has been removed, so it sounds like you will indeed need longer pushrods.
