I am interested in the stage 3 cam and the ported heads on your website.What would be the best or max ratio rockers ?

If you're planning to go with the Stage 3 COMP Cam to suit an L67, then our recommendation would be to run standard rockers or 1.7:1 ratio rockers. There is no need to run split ratio rockers due to the fact that this cam profile has already taken it into account.