Until the pushrod punches through the rocker arm. That gets real ugly if the lifter comes out of its bore. No oil pressure. I’ve been unlucky to have this happen to me on stock SB’s...
No roller rockers back in the day...How many races did Petty win with stock rocker arms? I know they did reinforce them but still.... all those 60's super stocks with 413's... Roadrunners, GTX's, Challengers...
I worked at Mopar dealers '68-'72. Saw a few break... not enough to matter.
Personally I'd rather run stock rockers with a juice cam on the street. Racing is different... I have T&D's and stock adjustables... Jesel are great, too. Guy's build strokers, spend big $$$ on paint and chrome but buy the cheapest Chi-Com rockers they can find. Just does not make sense. The ratios are all over the place... even with Sharp's.
