Along with the question of identification can anyone shed any light on the realiability of aluminum rockers. I'am building a 350 with about 300 to 330 horses. I want a realiable engine that will only see track time ocasionally.
Thanks in advance!

 

if you run aluminum rockers plan on a failure sooner or later, 30,000 miles on the street ought to do it. buy steel full roller rockers from comp, lighter and they last longer.

 

aluminum is fine on the street.
The steel ones are heavier.

 

I agree with ede, I will not put aluminum moving parts of any kind in anything that I want to run for any length of time. It fatigues and breaks in half suddenly without warning. That's why so many aircraft things are legally required to be replaced at specified intervals, not merely inspected; you can't tell when it's about to break.

Steel rockers can be (and are) designed so that their moment of inertia, i.e. the rotating equivalent of linear momentum, is lower than is possible with aluminum.

Run steel on the street. Just not those ones in the pic. I can't think of any criterion by which an aluminum rocker is superior, except for their price.