I just replaced my lifters with OEM replacements and my stock pushrods with comp hi-techs (stupid comp "R"s let go) and after we get the rockers adjusted (and yes the rockers are correct we have adjusted them everyway known to man) the car will idlea fine but once you spin it up around 3K it will throw a pushrod. Also its a different rod each time, WTF

 

Stupid question I know....but did you measure to make sure you got the right length?

Are your rockers self-adjusting or non-self-adjusting?

If they're NSA, are you using guideplates?

 

Are they stock length push rods? Are they bent? Do you have guideplates installed?