IMM Engines 408 build

Well, if you get away from the idea that the sweeps needs to be perfectly centered, then you gain some flexibility, and can more easily get the sweeps narrower. You may have to change pushrods, but very probably no moving of the studs. Your level of valve lift would benefit from making things better IMHO.

Can you measure how wide the sweep is? Your report of 'wide' may not be all that wide after all. And to your original question, no way to tell you to move the rockers up or down without seeing the angle of the rocker to the valve tip at mid lift. (Mike may just know the answer from long experience with those particular parts...)