Has anybody had a problem with the pushrods rubbing the holes in Edelbrock heads ar max lift? I just ran into this while assem my engine. I used a Hughes solid lifter cam. I called Hughes, they said this wasn't uncommon for this to occur. They were rubbing towards the intake side. I had to pull the heads back off & have my machinist open them up. No problems now. I'm using the ductile iron rockers & 5/16 Crane pushrods. I just thought I would give everybody else a heads up. These heads are some of the earliest ones made, circa 1999.