Roller Rockers in Stock

[SSDiv6]

Originally Posted by Steve Calabro

I have a question. Is it not true that both Ford and Chrysler motors with hydraulic lifters came with stamped steel rocker arms NOT the iron ones that most racers use that came on the solid lifter motors only?

Mopars, with the exception of the Max Wedge and 273 engines, they had stamped steel shaft rockers from the factory. I would say that approximately 20 years ago, they were allowed to use the ductile iron rockers based on their availability in the same engine family: 273 and 426 Max Wedge. (Big Blocks: 361, 383, 400, 413, 426 and 440) (Small Blocks: 273, 318, 340 and 360). Ford 390, 427 and 428 had ductile iron shaft rocker arms from the factory.