The Pro Mags hit the thin sheet metal baffles on the underside of the rocker covers. If you grind off the rivets that hold them on with a dremmel tool you can remove those baffles and you won't have a clearance problem.

 

I beg to differ my pro mags still hit the underside of the valve covers I had to grind the **** out of them and get a buddy to tig weld the slots on the valve cover where I almost ground through.

 

I also had to grind material off the valve covers at all the places where the coils mount, then you have to weld these shut. Also adjusting these are not fun. for whatever reason the plungers in the lifters do not like to center and start clattering again just when you think you are finished. If I could buy my rockers over again I would go w/ the Harland Sharps that are non-adjustable w/ no clearance issues. My motor is v=never going to see 8000 rpm's anyway.

 

What ratio did you guys install. I just went with the stock ratio.