I made over 700hp with stock rockers. So that begs the question are aftermarket rockers even necessary? I used Harland sharp 1.6 on a magnum that was for a friend and really liked them but they were non adjustable and pushrod length must be spot on. I used a comp Chevy pedestal mount adjustable on a 5.2 with a conversion stud but it was 15 years ago and I don’t remember whose stud it was. Those worked just fine also. My current 5.9 is getting W2s, so offset shaft setup that Mike at B3 scienced out for me. Whichever rocker you use, take some time making the geometry right and measuring for pushrod length and it’ll be fine.