Factory rocker defeated by pushrod.

HiFire said
The aftermath of freeway speeds on a 68 340 with original rockers. The engine is in a 71 Sweptline. The springs are setup for a purple 484 cam. The cam is now a Howards 710931-12 with the 484 springs. Planning on replacement rockers from Mancini. Would like adjustable rockers but money is an issue. Anybody have pos/neg opinions on there rockers? Thanks everyone for your help.

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Your rockers were prolly weak just like mine were. I am running a 509 purple cam in my 340 with stock rockers / springs and I had the same thing happen so I just replaced all rockers and springs with new stock rockers & springs and 2k miles later I have had no issues..