Cam design limitations

Hey bill i read what you posted about lob separation and duration is this for tuning at idle?
So you can optimize boost.if so wont a higher duration help you out in the higher rpm range and if so have you looked in to the rhoads lifter as they allow you variable duration for better idle and pump up around 3000 rpm.I know this is a slant 6 but i use rhoads lifters in my 440 and i have a long duration cam but i idle very well at 800 rpm.just asking if this might help save you a dollar.

http://www.rhoadslifters.com/Pages/PartNumber.html

I just checked web site they dont list /6 but i would call them any way.