Push Rods which one?

I think what he is trying to tell you is Smith Bros is giving you a general answer. Those adjusters you have are known to break if too many threads are sticking out. I would run them but in the back of my mind at 6-7K the thought of it coming apart would always be there. If one of them do it could cost you a lot more than ordering a new set of push rods right now......

It is like putting a good size cam in with stock rockers. YES it can be done but there is a weak link in the chain.