Rocker Arm Stud Breakage again! Need some Advice!

Hi guys Pulled the truck again (400 BB) got half way down the track and lost all OP and engine missing. I had this happen before (3 times now) 1st time just the stud was broken, 2nd time lifter was blown out of the bore, and this time. I need to get something figured out. I have it where the stud itself has 0-1 threads showing so my geometry is good. Im using Crane Gold 1.6 Roller rockers, Lunati 73100 valve springs, and comp cromoly ball/cup P-rods. Is the double valve spring too much for the rocker or ? Should I get a better quality rocker? If so What?? Any help is appreciated. Thanks Jon