I know from rebuilding so many that there are several sizes of pushrods.. I have never installed THAT head on THAT engine.. I think I would go down the the parts house and ask for one of each and stand them up side by side and then I would KNOW what I had to deal with. When in doubt I always go a little longer. If too long the darn valve won't close.. If too short you will have an immediate click. If almost too short then the click will WEAR into hearing before it's time.
Big Jim <img src="/forums/images/graemlins/cheers.gif" alt="" />