Pushrod problem with Speedmaster heads

Ok. i agree with lifter and pushrod pushing toward center top of the bore when up on the lobe.
This SpeedMaster thread right?
I got the alum SM rockers too.
When the cam comes up on the lobe, the pushrod moves away from the hole opening. W/ the SM 1.6 ratio rockers, it is tightest when the lobe is down.
So, just a little clearance work there.
Down near the lifter, I’ve found you need to open up , at an angle, about 2” up into the machined hole at an angle that brings you out the the edge on the end of the deck surface.

I guess you could just bore the hole bigger all the way through, but that would take away the potential of porting and opening up the pushrod pinch thru the intake.

I’ve had to do this by hand. And my Harbour Freight electric die grinder , speed controlled down, and cheap cutters have made this a job.
I have found the long side cutting bits, for side cutting tools (panel, drywall, for receptacle holes and such) work well and are cheap. They reach well up there. And cut.