As Dwayne said bigger is better just not always practical. I would rather see an .080" 7/16" than a .120" wall 3/8" but sometimes it just is not practical. As Dom pointed out the pushrod weight is not relevant when considering valvetrain weight. Most people would be shocked how much is lost to deflection, not just with the pushods either
Agreed. If I had the foresight to clearance my hemi block more I would have ran 7/16. As it is I could only fit single taper 3/8 to 7/16 (.165)
Intake valve lift with checker spring was .658
With 600lbs open it was .631
