35% off SpeedMaster

If you stick to 1.437 springs and comp 740-16 retainers n super locks and inside the factory stem height range.. you clear the comp, prw steel rocker just fine...

That's not always realistic, so you now you need to relocate the shaft away... and hey..what the scrub looking like on the valve from the roller? Offset toward the exhaust side of the head? Wide, narrow, in between?

A geometry kit that moves the shaft away would fix the scrub and the spring diameter limitation/interference issue.