1.7 rocker ratio? that there is out of my league...but...the 270 is still a healthy cam... converter w/ the 280...you are definatelly gonna want some stall w/ it...I ran a cam that was within my stall speed and put on a torker...talk about SLUG off the line...so you could imagine how big of an effect it would be w/ a larger duration cam...let alone the 1.7 rockers...