Ok so i have my 350 short block built and ready to go, just waiting on my heads to arrive. Now this is my first engine build and i was wondering what to consider when choosing push rods and rocker arms. I want the engine to be a lethal street engine and be reliable on the track.

come on guys i really need some advice here cuz i don't want to ruin this engine and want as much out of it as possible

First ya got to tell us something about your engine, cam and heads. As far as just some general precautions, stay away from the cheap imported junk and stay with the tired and true,,, Crane, Jessle, Crower, Lunati, Comp....
Not knowing what heads yuor waiting for,, if you need an offset shaft rocker system I'm partial to Crower and Jessle. There are a few new kids on the block, but again, stick with the tried and true. If all you need is a roller rocker, Crane Gold race series are darn durable. I've never had one fail. If you all your looking for is a slipper rocker, Comp makes good ones for a reasonable price. Don't mess with the combination pivot ball / roller tip. IMO their just a gimmic. If you wnt roller rockers, get full roller rockers, or stick with a good slipper.
For pushrods, Comp, Crower, Lunati, Herbert, joes corner drug store,,, everybody makes chromoly pushrods and sells them now. Most places they are available in 0.050" lengths right off the shelf to get geometry right.
Don't really know what elst to offer without more info.

ok heres whats on the heads 1.5 roller rockers, 650 lift crower springs, stainless valves, screw in studs. The cam is an edelbrock performer plus with .42 and .442 lift at the valves. Now my question is will those valve springs hurt the cam at all when i break it in?? Need any other info guys???