I finally got around to swapping my iron heads (set up with ductile iron rockers and the original stamped steel hold-down tabs).
Now the aluminum heads are going together on the bench, and of course the valve gear doesn't line up the same with studs and aluminum hold-downs.
My cam has .652 gross lift and .018 lash, with spring pressures of approximately 130/430 lbs.
How critical is lateral alignment with the iron rockers? They have a pad that slides across the valve tip, not a roller... the old valves show a "stripe" that goes all the way across the tip, and actually at an angle!
I figure they can slide in any direction as long as there's enough oil getting to the rockers, and there will be little additional loading on the guide for the same reason.
Thoughts?
