Roller rocker question

Use these if you want roller rockers. I have the small block version in my 340 (you didn't state the size of the motor you're work with so here is one of each).
Big Block
http://www.summitracing.com/parts/cca-1621-16/overview/make/dodge

Small Block
http://www.summitracing.com/parts/cca-1622-16/overview/make/dodge