To my knowledge all the rockers are the same, its the lifters that are different. Confirm that with comp cams tommorow though and here's another option as well.
http://www.maxchevy.com/tech/2007/ii_7-rocker-2.html
Its a NX system and yes there's a huge benefit dod hardware does not like fast ramp rates and the more power you start making the less reliable those lifters become. The cam is also something like .421 max lift which blows. Because the profilenon the factory cam is also dffrent for those cylinders which means unequal airflow