Which Roller Rockers should I get?

[misfit41]

just an afterthought to this post,My racer friend {Nd Copley}whom I often refer to was in yesterday,he has had push rod rocker problems all year,hasnt finished a race becaue of it,this is a guy who has raced 427's for 35 years and was stumped,tried everything,rod lenght,different brand rockers,,etc.
After once again thinking he found the culprit ,he broke a rocker during a 6000 rpm hot lap,finally a sharp engineer noticed a scrape on the side of a seemingly good push rod {new at that}and figured out the rod had been flexing,after checking rockwell hardness,it was in the 20's,dove uses steel in the 60-65 rh range I think,after calling Earl at Dove enginering and having him check his rod stock blanks,they learned the steel was mistempered or mismarked by the supplier.I wonder if this could have happened to others too,granted Nd Copley has tons of spring pressure in his roller motor,but soft is soft.
he also shared with me that an alloy head 427 will "grow" .0010 from cold to operating temp,so always adjust the valves hot.
Lastly he got a set of unfinished rods from comp cams,65 rh and you cut to lenght and press in the top fulcrum,seems like the way to go to me.Tk