Fast01 said Honestly, I'm a Mopar newbie and only have experience with a big block. I don't want to give had info here, but here's a link to some general theory straight from the horse's mouth. www.compcams.com/Technical/Instructions/Files/Verifying%2520Pushrod%2520Length%2520And%2520Rocker%2520Arm%2520Geometry.pdf&ved=0ahUKEwid9NfWreHSAhUEtBQKHc9KAvEQFggyMAI&usg=AFQjCNFESLhgPI--0TSi4f8CAbdQgotOQA Click to expand...